Subjunctive

C2 · MasteryAdvanced Grammar

I suggest that he leave now. It's essential that everyone be on time.

What you'll learn

The mandative subjunctive uses the base form of the verb, with no -s, no tense change, regardless of subject
Triggered by verbs like suggest, insist, demand, recommend, propose, require, request + that
Also triggered by adjectives like essential, important, vital, necessary, crucial + that
A handful of fixed, formulaic subjunctive expressions survive outside this pattern: God save the Queen, So be it, If I were you

What the mandative subjunctive is

After certain verbs and adjectives expressing a demand, suggestion, or necessity, the following 'that'-clause uses the uninflected base form of the verb — not the form you'd expect from normal subject-verb agreement or tense.

"I suggest that he leave now. (not 'leaves')"

"It's essential that everyone be on time. (not 'is')"

Verbs that trigger it

Common trigger verbs include suggest, insist, demand, recommend, propose, require, and request, each followed by 'that' + subject + base-form verb.

"She insisted that he apologize."

"The doctor recommended that she rest."

"The committee demanded that the report be revised."

Adjectives that trigger it

The same pattern follows 'it's' + certain adjectives — essential, important, vital, necessary, crucial — + 'that'. The negative simply adds 'not' before the base verb.

"It's essential that everyone be on time."

"It's important that he not be late."

Fixed, formulaic expressions

A few subjunctive forms survive only as fixed expressions, unrelated to the mandative pattern above — they're memorized as whole phrases rather than built from a rule.

"God save the Queen."

"So be it."

"If I were you, I'd apologize."

Real English

"I propose that he attend the meeting."

"It's vital that she know the truth."

"They require that all visitors sign in."

"I request that the file be sent today."

Watch out

✗I suggest that he leaves now.

✓I suggest that he leave now.

After a mandative trigger verb like 'suggest', use the base form — not the normal third-person -s form.

✗She insisted that he apologized.

✓She insisted that he apologize.

The mandative subjunctive stays in the base form even when the main verb is in the past tense — it doesn't backshift like reported speech.

✗It's important that he doesn't be late.

✓It's important that he not be late.

The negative subjunctive is formed with 'not' directly before the base verb — no 'do/does/doesn't' support.

Real life — A workplace policy update

"Did you see the new policy?"

"Yeah — it says it's essential that every employee complete the training by Friday."

"What if someone can't make it?"

"HR insisted that we notify them in advance if that happens."

Practice

Exercise 1 · Choose the correct mandative subjunctive sentence

Choose the correct mandative subjunctive sentence.

Exercise 2 · Choose the correct mandative subjunctive sentence

Choose the correct mandative subjunctive sentence.

Exercise 3 · Choose the correct mandative subjunctive sentence

Choose the correct mandative subjunctive sentence.

Exercise 4 · Choose the correct mandative subjunctive sentence

Choose the correct mandative subjunctive sentence (adjective + that).

Exercise 5 · Choose the correct negative mandative subjunctive

Choose the correct negative mandative subjunctive.

Exercise 6 · Choose the correct mandative subjunctive sentence

Choose the correct mandative subjunctive sentence.

Exercise 7 · Choose the correct formulaic subjunctive expression

Choose the correct formulaic subjunctive expression.

Exercise 8 · Choose the correct formulaic subjunctive expression

Choose the correct formulaic subjunctive expression.

Exercise 9 · Use the mandative subjunctive

Use the mandative subjunctive: 'I propose (he / attend) the meeting.' → I propose that he ___ the meeting.

Exercise 10 · Use the mandative subjunctive

Use the mandative subjunctive: 'It's vital (she / know) the truth.' → It's vital that she ___ the truth.

Exercise 11 · Sort into groups

I suggest he go.

I suggest he goes.

It's necessary that she be informed.

It's necessary that she is informed.

0 / 4 sorted

Quick challenge

Five quick questions to check what stuck.

Question 1 / 5

Score: 0/0

Choose the correct mandative subjunctive sentence.

You learned

The mandative subjunctive uses the base form of the verb, regardless of subject or tense.
Triggered by verbs like suggest, insist, demand, recommend, propose, require, request.
Also triggered by adjectives like essential, important, vital, necessary, crucial.
A few fixed formulaic expressions (God save the Queen, So be it) survive outside this pattern.

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