Form a question using the same verb in the blank.
"The children were building a snowman in the yard."
The question is formed by using the past progressive auxiliary verb "were" before the subject "the children," followed by the present participle "building."
Progressive
The progressive or continuous aspect is used to denote a temporary action or state that began at a previous time and continues into the present time (or other time of reference). It is expressed using a form of the auxiliary verb to be (conjugated appropriately for tense etc.) together with the present participle (-ing form) of the main verb: I am reading; Were you shouting?; He will be sitting over there.
Certain stative verbs make limited use of progressive aspect. Their nonprogressive forms (simple or nonprogressive perfect constructions) are used in many situations even when expressing a temporary state.
The main types are described below.
- The copular verb to be does not normally use progressive forms (I am happy, not I am being happy). However its progressive aspect is used in appropriate situations when the verb expresses the passive voice (We are being followed), and when it has the meaning of "behave" or "act as" (You are being very naughty; He's being a pest).
- The verb to have does not use progressive forms when it expresses possession), broadly understood (I have a brother, not I'm having a brother), but it does use them in its active meanings (I'm having a party; She's having a baby; He was having a problem starting his car). Other verbs expressing a state of possession or similar, such as possess, own, belong and owe, also do not normally use progressive forms.
- Verbs of mental state, sense perception and similar (know, believe, want, think, see, hear, need, etc.) are generally used without progressive aspect, although some of them can be used in the progressive to imply an ongoing, often temporary situation (I am feeling lonely), or an activity (I am thinking about a problem).
- Verbs denoting positional state normally do use the progressive if the state is temporary: He is standing in the corner. (Compare permanent state: London stands on the banks of the Thames.)
Perfect Progressive
The perfect and progressive (continuous) aspects can be combined, usually in referring to the completed portion of a continuing action or temporary state: I have been working for eight hours. Here a form of the verb have (denoting the perfect) is used together with been (the past participle of be, denoting the progressive) and the present participle of the main verb.
In the case of the stative verbs, which do not use progressive aspect, the plain perfect form is normally used in place of the perfect progressive: I've been here for half an hour (not I've been being here...).
Questions
Like many other Western European languages, English historically allowed questions to be formed by inverting the positions of verb and subject. Modern English permits this only in the case of a small class of verbs ("special verbs"), consisting of auxiliaries as well as forms of the copula be. To form a question from a sentence which does not have such an auxiliary or copula present, the auxiliary verb do (does, did) needs to be inserted, along with inversion of the word order, to form a question. For example:
- She can dance. → Can she dance? (inversion of subject she and auxiliary can)
- I am sitting here. → Am I sitting here? (inversion of subject I and copula am)
- The milk goes in the fridge. → Does the milk go in the fridge? (no special verb present; do-support required)
The above concerns yes-no questions, but inversion also takes place in the same way after other questions, formed with interrogative words such as where, what, how, etc. An exception applies when the interrogative word is the subject or part of the subject, in which case there is no inversion. For example:
- I go. → Where do I go? (wh-question formed using inversion, with do-support required in this case)
- He goes. → Who goes? (no inversion, because the question word who is the subject)
Note that inversion does not apply in indirect questions: I wonder where he is (not *... where is he). Indirect yes-no questions can be expressed using if or whether as the interrogative word: *Ask them whether/if they saw him*.
Negative questions are formed similarly; however if the verb undergoing inversion has a contraction with not, then it is possible to invert the subject with this contraction as a whole. For example:
- John is going. (affirmative)
- John is not going. / John isn't going. (negative, with and without contraction)
- Isn't John going? / Is John not going? (negative question, with and without contraction respectively)
Tag questions are formed with a special verb and pronoun subject: isn't it?; were there?; am I not?
Verb
A verb is a word that expresses an action, a state, or an occurrence — and it's the engine of every English sentence. Understanding how verbs work is foundational to everything else in English grammar, from forming questions to building complex sentences.
Verb Forms
Most English verbs have five inflected forms:
- Base form (go, write, climb) — used as an infinitive, imperative, present subjunctive, and present indicative in all persons except third-person singular.
- -s form (goes, writes, climbs) — used for the present tense, third-person singular (she writes).
- Past tense (went, wrote, climbed) — also called the preterite.
- Past participle (gone, written, climbed) — identical to the past tense for regular verbs, but often different for irregular verbs.
- -ing form (going, writing, climbing) — serves as the present participle and gerund.
The verb be is a special case with more forms than any other English verb (am, is, are, was, were, been, being). Modal verbs like can, must, and should have fewer forms than typical verbs.
Main Verbs and Auxiliaries
Verbs in English often appear in combinations: one or more auxiliary verbs paired with a main verb.
- The dog was barking very loudly.
- My hat has been cleaned.
- Jane does not really like us.
The first verb in the combination is the finite verb (it carries tense and agrees with the subject). The rest are nonfinite (infinitives or participles). Notice that these verbs don't always sit next to each other — as in does not really like.
Tense, Aspect, and Mood
English expresses tense (time reference), aspect (how an action unfolds over time), and mood (the speaker's attitude toward the action) mostly through verb combinations rather than word endings. That's why you'll encounter labels like "present progressive" or "conditional perfect" — these are specific tense–aspect–mood combinations built with auxiliaries.
Self-check: If you can change the time of a sentence by swapping one word (She runs → She ran), that word is the verb.
Keep Practising
To build your verb skills from the ground up, try these challenges: Basics. "To be" in Present Tense, Basics. Common Uses of Auxiliary Verbs, and Transitive and Intransitive Verbs.
Simple Past
The simple past, past simple or past indefinite, sometimes called the preterite, is the basic form of the past tense in Modern English. It is used principally to describe events in the past, although it also has some other uses. Regular English verbs form the simple past in -ed; however there are a few hundred irregular verbs with different forms.
The term "simple" is used to distinguish the syntactical construction whose basic form uses the plain past tense alone, from other past tense constructions which use auxiliaries in combination with participles, such as the past perfect and past progressive.
Formation
Regular verbs form the simple past end*-ed*; however there are a few hundred irregular verbs with different forms. For details see.
Most verbs have a single form of the simple past, independent of the person or number of the subject (there is no addition of -s for the third person singular as in the simple present).
However, the copula verb be has two past tense forms: was for the first and third persons singular, and were in other instances.
The form were can also be used in place of was in conditional clauses and the like; for information on this, see subjunctive.
This is the only case in modern English where a distinction in form is made between the indicative and subjunctive moods in the past tense.
Questions, other clauses requiring inversion, negations with not, and emphatic forms of the simple past use the auxiliary did.
A full list of forms is given below, using the (regular) verb help as an example:
- Basic simple past:
- I/you/he/she/it/we/they helped
- Expanded (emphatic) simple past:
- I/you/he/she/it/we/they did help
- Question form:
- Did I/you/he/she/it/we/they help?
- Negative:
- I/you/he/she/it/we/they did not (didn't) help
- Negative question:
- Did I/you/he/she/it/we/they not help? / Didn't I/you/he/she/it/we/they help?
Usage
The simple past is used for a single event (or sequence of such events) in the past, and also for past habitual action:
- He took the money and ran.
- I visited them every day for a year.
It can also refer to a past state:
- I knew how to fight even as a child.
For action that was ongoing at the time referred to, the past progressive is generally used instead (e.g. I was cooking). The same can apply to states, if temporary (e.g. the ball was lying on the sidewalk), but some stative verbs do not generally use the progressive aspect at all, and in these cases the simple past is used even for a temporary state:
- The dog was in its kennel.
However, with verbs of sensing, it is common in such circumstances to use could see in place of saw, could hear in place of heard, etc.
- I felt cold.
If one action interrupts another, then it is usual for the interrupted (ongoing) action to be expressed with the past progressive, and the action that interrupted it to be in the simple past:
- Your mother called while you were cooking.
The simple past is often close in meaning to the present perfect.
The simple past is used when the event happened at a particular time in the past, or during a period which ended in the past (i.e. a period that does not last up until the present time).
This time frame may be explicitly stated, or implicit in the context (for example the past tense is often used when describing a sequence of past events).
- I was born in 1980.
- We turned the oven off two minutes ago.
- I came home at 6 o'clock.
- When did they get married?
- We wrote two letters this morning.
- She placed the letter on the table, sighed, and left the house.Contrast these examples with those given at.
Note also that for past actions that occurred before the relevant past time frame, the past perfect is used.
Various compound constructions exist for denoting past habitual action.
The sentence When I was young, I played football every Saturday might alternatively be phrased using used to (... I used to play ...) or using would (... I would play...).
The simple past also has some uses in which it does not refer to a past time.
- If he walked faster, he would get home earlier.
- I wish I knew what his name was.
These are generally in condition clauses and some other dependent clauses referring to hypothetical circumstances, as well as certain expressions of wish:
- He said he wanted to go on the slide.
Past Progressive
The past progressive or past continuous construction combines progressive aspect with past tense, and is formed using the past tense of be (was or were) with the present participle of the main verb.
It indicates an action that was ongoing at the past time being considered:
- At three o'clock yesterday, I was working in the garden. For stative verbs that do not use the progressive aspect, the simple past is used instead (At three o'clock yesterday we were in the garden).
The past progressive is often used to denote an action that was interrupted by an event, or for two actions taking place in parallel:
- While I was washing the dishes, I heard a loud noise.
- While you were washing the dishes, Sue was walking the dog.(Interrupted actions in the past can also sometimes be denoted using the past perfect progressive.)
The past progressive can also be used to refer to past action that occurred over a range of time and is viewed as an ongoing situation:
- I was working in the garden all day yesterday. That could also be expressed using the simple past, as I worked..., which implies that the action is viewed as a unitary event (although the effective meaning is not very different).
Past Perfect
The past perfect, sometimes called the pluperfect, combines past tense with perfect aspect; it is formed by combining had (the past tense of the auxiliary have) with the past participle of the main verb.
It is used when referring to an event that took place prior to the time frame being considered.
This time frame may be stated explicitly, as a stated time or the time of another past action:
- We had finished the job by 2 o'clock.
- He had already left when we arrived.
The time frame may also be understood implicitly from the previous or later context:
- I was eating ... I had invited Jim to the meal but he was unable to attend. (i.e. I invited him before I started eating)
- I had lost my way. (i.e. this happened prior to the time of the past events I am describing or am about to describe)
Compare He had left when we arrived (where his leaving preceded our arrival), with the form with the simple past, He left when we arrived (where his leaving was concurrent with or shortly after our arrival).
Note that unlike the present perfect, the past perfect can readily be used with an adverb specifying a past time frame for the occurrence.
For example, while it is incorrect to say I have done it last Friday (the use of last Friday, specifying the past time, would require the simple past rather than the present perfect), there is no such objection to a sentence like "I had done it the previous Friday".
The past perfect can also be used for states or repeated occurrences pertaining over a period up to a time in the past, particularly in stating "for how long" or since when". However, if the state is temporary and the verb can be used in the progressive aspect, the past perfect progressive would normally be used instead. Some examples with the plain past perfect:
- I had lived in that house for 10 years.
- The children had been in their room since lunchtime.
Past Perfect Progressive
The past perfect progressive or past perfect continuous (also known as the pluperfect progressive or pluperfect continuous) combines perfect progressive aspect with past tense.
It is formed by combining had (the past tense of auxiliary have), been (the past participle of be), and the present participle of the main verb.
Uses of the past perfect progressive are analogous to those of the present perfect progressive, except that the point of reference is in the past.
For example:
- I was tired because I had been running.
- By yesterday morning they had already been working for twelve hours.
- Among the witnesses was John Smith, who had been staying at the hotel since July 10.
This form is sometimes used for actions in the past that were interrupted by some event (compare the use of the past progressive as given above).
For example:
- I had been working on my novel when she entered the room to talk to me.
This implies that I stopped working when she came in (or had already stopped a short time before); the plain past progressive (I was working...) would not necessarily carry this implication.
If the verb in question does not use the progressive aspect, then the plain past perfect is used instead.
The past perfect progressive may also have additional specific uses similar to those of the plain past perfect.
A1 | Elementary | Beginners
CEFR A1 is the first level of the Common European Framework of Reference for Languages (CEFR), a widely used standard for measuring language ability. If you're just starting to learn English — or rebuilding from scratch — this is where you begin.
What can an A1 learner do?
At A1, you can handle the most basic, everyday communication. Specifically, you're expected to:
- Understand and use familiar everyday expressions — greetings, simple questions, common signs and instructions.
- Introduce yourself and others — say where you live, talk about people you know, describe things you have.
- Ask and answer simple personal questions — "What's your name?", "Where are you from?", "Do you have a car?"
- Have short conversations — as long as the other person speaks slowly and clearly and is willing to help.
What grammar does A1 cover?
A1 focuses on the building blocks of English grammar. You'll work with:
- Basic verb forms — the present tense of be, have, and do, plus simple regular and irregular verbs
- Simple sentence structure — subject + verb + object word order
- Common determiners and pronouns — a, the, this, my, he, she, it
- Basic prepositions — in, on, at, to, from
- Simple questions — yes/no questions and wh- questions (what, where, who)
- Everyday vocabulary and collocations — phrases that naturally go together, like make breakfast or do homework
How do you know if you're A1?
If you can read a short text like a menu or a bus sign, fill out a simple form with your personal details, and ask someone basic questions in English — you're operating at A1. If most of that still feels challenging, you're in exactly the right place.
Self-check: Try introducing yourself in five sentences — your name, where you're from, what you do, something you like, and one question for the other person. If you can do that (even with mistakes), you're solidly at A1.
What's next?
Once you're comfortable with A1 basics, you'll move toward A2, where sentences get longer, tenses expand, and you start handling more real-world situations.
To start practising, try these challenges: Are you A1/Beginner? Test your English CEFR Level!, "To be" in Present Tense, and Basics. Word Order..
Difficulty: Easy
Easy difficulty. Difficulty levels represent author's opinion about how hard a question or challenge is.