Future perfect simple tense

Form:

will have + past participle or a regular verb + ed

is/are going to have + past participle or a regular verb + ed (less common)

Examples:

I will have done the project by the boss arrives.

She will have been married for 12 years this summer.

He will have done all his exams by next Tuesday.

Usage:

We use ‚future perfect tense‘ to say that an action will be finished or completed by a certain moment in the future.

We also use it when we want to say that an action will have lasted for some time at a certain point in the future.

Examples:

Tom is playing tennis from 6pm to 7pm; it’s 6.15 now and Jake wants to call him.

I’ll say to Jake: ‚Wait and call Tom after 7 o’clock. He will have finished playing by then.

Meaning: The action (playing tennis) will be over at 7pm.

Mary bought a house in September 2009, so in September 2013 it will have been 4 years since she bought the house.

Future perfect continuous

Form:

will have been + verb + ing

Examples:

At 6pm tonight she will have been playing the piano for 28 hours.

This September I will have been teaching for 3 years.

Usage:

We use it when talking about continuous activity into the future.

Examples:

By next Monday, the new machinery will have been working at 100% output.

If he can keep it up, he will have been swimming for 16 hours at 8pm tonight.

She will have been working there for 3 years next week and still no pay rise.

verbs of senses: feel, hear, see, smell, sound, taste

verbs of feelings: love, hate, like, want, fear, respect, admire, adore, dislike, wish, prefer, impress, concern

verbs of mental activity: agree, believe, expect, know, mean, remember, trust, understand, recognise, realise, suppose, imagine, doubt

verbs of possession: belong, own, owe, possess

other verbs: astonish, appear, deny, seem, surprise, consist, include, fit, involve