Grammar Bank: Second Conditionals and Present Perfect

Vocabulary and grammar rules focusing on second conditionals, the distinction between first and second conditionals, and the use of present perfect with for and since compared to the past simple.

Second conditional (form)

A grammar structure consisting of if + past simple and would / wouldn't + infinitive.

Second conditional (usage)

Used to talk about an imaginary or hypothetical future situation and its consequence.

Conditional tense

The term sometimes used for the would + infinitive structure, which can also be used without an if-clause for hypothetical situations.

'd

The contraction for 'would', used for all persons (e.g., I'd, you'd, he'd).

Second conditional punctuation

If the if-clause comes first, a comma is usually placed before the next clause; if the if-clause comes second, no comma is needed.

Could + infinitive

A modal structure that can be used instead of would + infinitive in the result clause of a second conditional.

The verb 'be' in second conditionals

The form 'were' can be used instead of 'was' after I / he / she / it (e.g., If Jack were here).

If I were you

An expression used for giving advice, requiring 'were' instead of 'was'.

First conditional (usage)

Used for possible future situations that may realistically happen.

Present perfect + for and since

Used to talk about actions and states which started in the past and are still true now.

How long…?

A question form used to determine the duration of an action or a state.

For

A preposition used with a period of time, such as 'three months', 'two weeks', or 'ten years'.

Since

A preposition used with the beginning of a period of time, such as '2014', 'last June', or '1984'.

Past simple (duration usage)

Used to talk about a finished period of time in the past, often for people who are dead (e.g., Janet Leigh was married to Tony Curtis for 11 years).

Present perfect (duration usage)

Used to talk about an unfinished period of time from the past until now, often for people who are still alive (e.g., Jamie Lee Curtis has been married since 1984).