GRAMMAR

With Non-Continuous Verbs and some non-continuous uses of Mixed Verbs, we use the Future Perfect to show that something will continue up until another action in the future.

Examples:

I will have been in London for six months by the time I leave.

By Monday, Susan is going to have had my book for a week.

Although the above use of Future Perfect is normally limited to Non-Continuous Verbs and non-continuous uses of Mixed Verbs, the words "live," "work," "teach," and "study" are sometimes used in this way even though they are NOT Non-Continuous Verbs.

REMEMBER No Future in Time Clauses

Like all future forms, the Future Perfect cannot be used in clauses beginning with time expressions such as: when, while, before, after, by the time, as soon as, if, unless, etc. Instead of Future Perfect, Present Perfect is used.

Examples:

I am going to see a movie when I will have finished my homework. Not Correct

I am going to see a movie when I have finished my homework. Correct

ADVERB PLACEMENT

The examples below show the placement for grammar adverbs such as: always, only, never, ever, still, just, etc.

Examples:

You will only have learned a few words.

Will you only have learned a few words?

You are only going to have learned a few words.

Are you only going to have learned a few words?