The Subjunctive in That-Clauses
The formal subjunctive mood in English is used to express demands, recommendations, or necessities in that-clauses. Instead of using typical tense conjugation, the verb takes its base form (the bare infinitive), regardless of the subject. For example, we say, "I insist that he arrive on time" (not arrives) and "It is crucial that she not be disturbed" (not is not).
This challenge will test your mastery of this advanced structure across a variety of eccentric scenarios, from a demanding opera diva and a picky potion-making wizard to strict starship protocols. You will need to correctly identify and apply the active subjunctive ("wear", "remain"), the passive subjunctive ("be painted", "be taken"), the negative subjunctive ("not burn", "not awaken"), and even the tricky continuous subjunctive ("be sleeping").
You'll navigate 10 questions featuring a mix of drop-down, single-choice, multi-choice, and drag-and-drop formats. Try the quiz to check your knowledge!
The correct answers are be sleeping, not awaken, and should be sleeping.
Adjectives expressing importance or necessity (like crucial, vital, essential, imperative) also trigger the subjunctive mood in the following that-clause.
- be sleeping: This is the continuous (or progressive) subjunctive, formed with be + present participle (-ing).
- not awaken: This is the standard negative subjunctive (not + base form).
- should be sleeping: This is the "putative should," a perfectly valid alternative to the subjunctive, widely used in both American and British English.
Does not awaken uses the indicative mood, which is inappropriate for formal subjunctive structures, and to sleep is an infinitive, which cannot act as the main verb in a that-clause.
The correct answers are wear and be.
After verbs of requesting/insisting (like insist) and nouns of suggestion (like recommendation), the following that-clause requires the subjunctive mood.
Even though "every guest" is a third-person singular subject, we drop the "-s" and use the base form wear. Similarly, we use the base form be instead of the indicative is, even for a singular subject like "the court jester".
Help the exhausted stage manager complete the diva's list of outrageous demands by dragging the correct verb forms into the gaps.
The opera star insisted that her dressing room be painted completely black before her arrival.
She also demanded that the director not speak to her directly during rehearsals.
Finally, it is crucial that a bowl of green M&Ms wait on her vanity table at all times.
The opera star insisted that her dressing room be painted completely black before her arrival.
After verbs of insisting, we use the subjunctive mood in the that-clause. The passive subjunctive uses the base verb "be" + past participle ("be painted").
She also demanded that the director not speak to her directly during rehearsals.
To form the negative subjunctive, we place "not" directly before the base form of the verb. We do not use "do not" or "doesn't".
Finally, it is crucial that a bowl of green M&Ms wait on her vanity table at all times.
After adjectives of importance (like "crucial"), we use the base form of the verb for all subjects. Even though "bowl" is singular, we drop the third-person "-s" and use "wait" instead of "waits".
The correct answers are not be left and should not be left.
In formal English, verbs like demand, insist, and recommend trigger the mandative subjunctive in the following that-clause.
To form the negative passive subjunctive, we simply use not + be + past participle (e.g., not be left). We do not use "do/does" as an auxiliary verb in the subjunctive mood.
Using should + base verb (e.g., should not be left) is also perfectly correct and is especially common in British English as an alternative to the pure subjunctive.
Help Dr. Von Quark finalize the safety protocols for his new time machine by dragging the correct verb forms into the gaps.
It is imperative that the temporal capacitor remain completely submerged in pickle juice.
I strongly recommend that my assistant, Igor, be wearing his lead underwear when the countdown begins.
Furthermore, I dictate that the dimensional portal not be opened until after lunch.
It is imperative that the temporal capacitor remain completely submerged in pickle juice.
Adjectives expressing urgency or necessity (like "imperative") trigger the subjunctive in the following that-clause. We use the base form of the verb ("remain") without an "-s".
I strongly recommend that my assistant, Igor, be wearing his lead underwear when the countdown begins.
Verbs of recommending trigger the subjunctive. Here, we need the continuous subjunctive form, which is "be" + present participle ("be wearing").
Furthermore, I dictate that the dimensional portal not be opened until after lunch.
This gap requires both the negative and passive subjunctive. We place "not" before the base form "be", followed by the past participle "opened".
Complete the starship captain's urgent log entry with the grammatically correct phrase.
"It is imperative that the hyperdrive _____ offline immediately, lest the space-llamas notice our energy signature."
The correct answer is be taken.
Adjectives expressing urgency or importance (like "imperative", "crucial", or "essential") trigger the subjunctive mood in a that-clause. In the passive voice, the subjunctive uses "be" + the past participle, regardless of the subject.
The correct answers are be released immediately, surrender his passport, and not leave the city limits.
The verb mandate requires the subjunctive mood in the that-clause. The subjunctive uses the bare infinitive (base form) of the verb for all subjects, including third-person singular (he/she/it).
- be released immediately: Correct passive subjunctive (be + past participle).
- surrender his passport: Correct active subjunctive (base form surrender, not surrenders).
- not leave the city limits: Correct negative subjunctive (not + base form).
Surrenders is the indicative mood, which is generally considered incorrect following mandated that in formal English. To be kept is an infinitive, which doesn't fit the grammatical structure of a that-clause.
Choose the correct word to complete the eccentric billionaire's last will and testament.
"I stipulate that my beloved pet penguin, Sir Waddles, _____ fed only the finest imported caviar every morning."
The correct answer is be.
Formal verbs of commanding or stipulating (like "stipulate", "demand", or "order") require the base form of the verb in the that-clause. For the verb "to be", the base form is simply "be", even for third-person singular subjects like "Sir Waddles".
The correct answers are be and not press.
When a that-clause follows an adjective of urgency (like crucial, essential, imperative) or a verb of demand (like demand, insist, require), we use the mandative subjunctive.
The subjunctive mood always uses the base form of the verb (e.g., be instead of is/are, and press instead of presses), regardless of the subject.
To make it negative, simply place not before the base verb (e.g., not press instead of does not press).
Help Chef Linguini finish his dramatic kitchen rules by selecting the correct verb form.
"I absolutely insist that the new sous-chef _____ the garlic before the vampires arrive!"
The correct answer is not burn.
After verbs expressing a demand, request, or insistence (like "insist"), we use the subjunctive mood in the following that-clause. The negative subjunctive is formed simply by placing "not" before the base form of the verb, without "do/does".
Adjective
If you've ever written a French nice old wooden table and felt something was wrong without knowing why, you've hit the adjective-order rule. English insists on a particular sequence — opinion, size, age, shape, colour, origin, material — and rearranging the words makes a sentence sound non-native even when every individual choice is correct.
An adjective describes a noun or pronoun: a tall building, the soup is hot. Most adjectives also take comparative and superlative forms (taller, tallest), which is how you compare things — another core piece you need from day one.
Clause
If you've ever been told your sentence is a "run-on" or that you've used a comma where there should be a semicolon — you've hit the limits of writing without seeing clauses. Get this concept solid and most punctuation problems quietly disappear: you can finally tell a complete thought from a fragment without guessing.
A clause is a grammatical unit built around a verb, usually with a subject and a predicate. Independent clauses stand alone (I missed the bus); dependent clauses can't (Because I overslept). Combine them and you build complex sentences.
Negation
If your native language uses double negatives (I don't see nothing) — like Russian, Spanish, or French — you've probably been told this is wrong in English and not been entirely sure what the fix is. Standard English uses one negative per clause: either I saw nothing or I didn't see anything, never both. Once you internalise that single rule, your written English clears up a lot.
Negation in English uses not after an auxiliary or modal verb: I am not going. Without an auxiliary, you add do-support (I do not go). Negative words like never and nobody already negate the clause — adding not on top creates non-standard double negatives.
Subjunctive mood
If you've heard if I were you and wondered why it's not if I was you — you've met the past subjunctive. English barely marks the subjunctive anymore, but in formal writing and a few stock phrases, getting it right (or wrong) is one of the clearest signals of a careful writer. I demand that he be present. / If I were richer. — both subjunctive, both reading as wrong if you swap them out.
The subjunctive mood marks hypothetical or counterfactual contexts. Two main forms: present subjunctive in that-clauses after verbs of recommendation (I suggest that he go) and past subjunctive were in unreal conditionals (If I were you). Mostly invisible in modern English, but unmistakable when present.
Verb
If grammar feels overwhelming, the fix is almost always to focus on verbs first. They carry the action, the time, the mood, and the voice — a single verb form decides whether your sentence reads as past or present, fact or hypothetical, active or passive. Get verbs solid and the rest of grammar suddenly looks much smaller.
A verb expresses action, state, or occurrence — the engine of every English sentence. Most verbs have five forms (base, -s, past tense, past participle, -ing); be has eight; modal verbs have fewer. Verbs carry tense, aspect, mood, and voice.
Verb mood
If grammar references confuse you with terms like "subjunctive" or "conditional" — and you've never quite understood why English needs them — you've hit the verb-mood layer. Each mood marks a different attitude: fact vs command vs hypothetical vs polite recommendation. Once that map is clear, structures like if I were you or I suggest he go stop looking like exceptions and start looking like a system.
Verb mood signals the speaker's attitude toward the action. The four English moods: indicative (facts), imperative (commands), subjunctive (hypotheticals, formal recommendations), and conditional (would/could constructions).
Passive voice
If your writing has been called "weak" or "evasive" — Mistakes were made, It was decided that... — you've hit the passive voice's main pitfall. Used deliberately, the passive is precise and useful: it foregrounds the action when the doer doesn't matter. Used by default, it makes prose feel like nobody's responsible for anything.
The passive voice is formed with be + past participle and turns the object into the subject: The chef cooked the meal → The meal was cooked (by the chef). Useful when the action matters more than the doer; overused, it makes writing feel evasive.
C1 | Advanced
If you've ever sat through a lecture in English, written a complaint letter, or argued a point in a meeting and come out feeling actually understood — not just tolerated — you've felt what C1 looks like. The level matters because it's where most universities, certifications, and skilled-work environments draw their language line.
C1 is the advanced level in the CEFR framework, demanding fluent and flexible language: inversion for emphasis, mixed and advanced conditionals, formal subjunctive, cleft sentences, and complex nominal phrases — all used appropriately across registers.
Difficulty: Hard
If easy and medium questions are clicking but you still feel exposed in real conversation or formal writing, you've outgrown the basics. Hard material is where the gaps you didn't know you had show up: the distractor that "sounds right", the rule that interacts with another rule, the case where context changes the answer. It's where genuine fluency is built.
The Hard difficulty tag marks upper-intermediate to advanced challenges — typically B2 and above. Interacting rules, edge cases, plausible distractors, and contexts that require genuine understanding rather than surface pattern-matching.