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Select the correct verbs.
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Romeo
Select an answer
about Juliette's potion,
would have not killed
he
*would not have killed*
himself.

Had Romeo known about Juliette's potion, he would not have killed himself.

This is a conditional with had instead of if (You can also say If Romeo had known...), so there is inversion. You put the (first) auxiliary verb before the subject, Had Romeo, and then the rest of the sentence stays the same. The second part is a normal clause where the verbs follow the subject he would not have killed. Not goes after the first auxiliary verb. Had Romeo known about Juliette's potion is the subordinate clause.

Edited: 2/24/2020
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Dependent Clause

A dependent clause is a clause that provides a sentence element with additional information, but which cannot stand alone as a sentence. A dependent clause can either modify an adjacent clause or serve as a component of an independent clause. Some grammarians use the term subordinate clause to refer only to adverbial dependent clauses.

The different types of dependent clauses include content clauses (noun clauses), relative (adjectival) clauses, and adverbial clauses.

In Indo-European languages, a dependent clause usually begins with a dependent word. One kind of dependent word is a subordinating conjunction. Subordinating conjunctions are used to begin dependent clauses known as adverbial clauses, which serve as adverbs.

In the following examples, the adverbial clauses are bold and the subordinating conjunctions are italicized:

  • Wherever she goes, she leaves her luggage (The adverbial clause wherever she goes modifies the verb leaves.)
  • Bob enjoyed the movie more than I did. (The adverbial clause than I did modifies the adverb more.)

A subordinating conjunction can also introduce a noun clause:

  • I know that he likes me. (The noun clause that he likes me serves as the object of the main-clause verb know.)

Another type of dependent word is the relative pronoun. Relative pronouns begin dependent clauses known as relative clauses; these are adjective clauses, because they modify nouns. In the following example, the relative clause is bold and the relative pronoun is italicized:

  • The only one of the seven dwarfs who does not have a beard is Dopey. (The adjective clause who does not have a beard describes the pronoun one.)

A relative adverb plays the part of an adverb in a relative clause, as in

  • That is the reason why I came. (The relative clause why I came describes the noun reason, and within the relative clause the adverb why modifies the verb came.)
  • That is the place where he lives. (The relative clause where he lives describes the noun place, and within the relative clause the adverb where modifies the verb lives.)

An interrogative word can serve as an adverb in a noun clause, as in

  • No one understands why you need experience. (The noun clause why you need experience functions as the direct object of the main-clause verb "understands", and within the noun clause why serves as an adverb modifying need.)
License: CC BY-SA 3.0. Source: wikipedia (1)

Subject–auxiliary Inversion

Subject–auxiliary inversion involves placing the subject after a finite auxiliary verb, rather than before it as is the case in typical declarative sentences (the canonical word order of English being subject–verb–object).

Note that forms of the verb be are included regardless of whether or not they function as auxiliaries in the sense of governing another verb form.

A typical example of subject–auxiliary inversion is given below.

  • Sam has read the paper. - Statement
  • Has Sam read the paper? - Yes–no question formed using inversion

Here the subject is Sam, and the verb has is an auxiliary. In the question, these two elements change places (invert). If the sentence does not have an auxiliary verb, this type of simple inversion is not possible. Instead, an auxiliary must be introduced into the sentence in order to allow inversion:

  • Sam enjoys the paper. - Statement with the non-auxiliary verb enjoys
  • *Enjoys Sam the paper? - This is idiomatically incorrect; simple inversion with this type of verb is considered archaic
  • Does Sam enjoy the paper? - The sentence formulated with the auxiliary does now allows inversion. For details of the use of do, did and does for this and similar purposes.

For exceptions to the principle that the inverted verb must be an auxiliary, see below.

It is also possible for the subject to invert with a negative contraction (can't, isn't, etc.). For example:

  • He isn't nice.
  • Isn't he nice? - The subject he inverts with the negated auxiliary contraction isn't.

Compare this with the uncontracted form Is he not nice? and the archaic Is not he nice?.

Subject–verb Inversion in English

Subject–verb inversion in English is a type of inversion where the subject and verb (or chain of verbs, verb catena) switch their canonical order of appearance, so that the subject follows the verb(s), e.. A lamp stood beside the bedBeside the bed stood a lamp. Subject–verb inversion is distinct from subject–auxiliary inversion because the verb involved is not an auxiliary verb.

License: CC BY-SA 3.0. Source: wikipedia (1, 2)

Independent clause

An independent clause (or main clause) is a clause that can stand by itself as a simple sentence. An independent clause contains a subject and a predicate and makes sense with another word(s).

Independent clauses can be joined by using a semicolon or by using a comma followed by a coordinating conjunction (and, but, for, or, nor, so, yet)

Examples

In the following example sentence, independent clauses are in italic, and conjunctions are in bold. Single independent clauses:

  • I have enough money to buy an ice cream cone.
  • My favourite flavour is chocolate.

Multiple independent clauses:

  • I have enough money to buy an ice cream cone; my favourite flavour is chocolate.
  • I have enough money to buy an ice cream cone, so let's go to the shop.
License: CC BY-SA 3.0. Source: wikipedia (1, 2)

Complex Sentence

A complex sentence has one or more dependent clauses (also called subordinate clauses). Since a dependent clause cannot stand on its own as a sentence, complex sentences must also have at least one independent clause. In short, a sentence with one or more dependent clauses and at least one independent clause is a complex sentence.

A sentence with two or more independent clauses plus one or more dependent clauses is called compound-complex or complex-compound.

In addition to a subject and a verb, dependent clauses contain a subordinating conjunction or similar word. There are a large number of subordinating conjunctions in English. Some of these give the clause an adverbial function, specifying time, place, or manner. Such clauses are called adverbial clauses.

When I stepped out into the bright sunlight, from the darkness of the movie house, I had only two things on my mind. (S. E. Hinton, The Outsiders))
This complex sentence contains an adverbial clause, When I stepped out into the bright sunlight from the darkness of the movie house. The adverbial clause describes when the action of the main clause, I had only two things on my mind, took place. A relative clause is a dependent clause that modifies a noun or noun phrase in the independent clause. In other words, the relative clause functions similar to an adjective.

  • Let him who has been deceived complain. (Miguel de Cervantes, Don Quixote)
  • You, who have never known your family, see them standing around you. (J.K. Rowling, Harry Potter and the Sorcerer's Stone)

A noun clause is a dependent clause that functions like a noun.

In the first example, the restrictive relative clause who has been deceived specifies or defines the meaning of him in the independent clause, Let him complain.

In the second example, the non-restrictive relative clause who have never known your family describes you in the independent clause, You see them standing around you.

A noun clause may function as the subject of a clause, or as a predicate nominative or an object.
What she had realised was that love was that moment when your heart was about to burst. (Stieg Larsson, The Girl with the Dragon Tattoo)
In this sentence the independent clause contains two noun clauses.
The noun clause What she had realized serves as the subject of the verb was, and that love was that moment serves as complement. The sentence also contains a relative clause, when your heart was about to burst.

License: CC BY-SA 3.0. Source: wikipedia (1, 2)

C1 / Advanced

A CEFR C1 level English language user is considered to be at Advanced level. A C1 level English language user is expected to have the following abilities:

  • Can understand a wide range of demanding, longer texts, and recognize implicit meaning
  • Can express themselves fluently and spontaneously, almost effortlessly.
  • Can use language flexibly and effectively for social, academic and professional purposes.
  • Can produce clear, well-structured, detailed text on complex subjects, showing controlled use of organizational patterns, connectors and cohesive devices.
  • Can understand specialized articles and longer technical instructions, even when they do not relate to their field.
  • Can use the language effectively and appropriately in their professional and academic life.

At C1 level, English language users are expected to have a high level of fluency and comprehension, with the ability to understand and produce complex language with ease. They should be able to communicate effectively in a variety of settings, both social and professional, using the language flexibly and appropriately. They should also be able to understand specialized texts and technical instructions with little difficulty.

C1 | Advanced.

Difficulty: Medium

Medium difficulty. Difficulty levels represent author's opinion about how hard a question or challenge is.