Future Perfect Continuous

If you're here for the first time, you may want to see a list of subjects that will make browsing this website more beneficial.

We use this tense to express actions that will be happening at a definite moment in the future.

By tomorrow I will have been saving money for a new house for 4 years.

Use

Common time expressions used in the Future Perfect Continuous :

Form

In positive sentences:

Subject	+	Auxiliary verb	+	Auxiliary verb	+	Auxiliary verb	+	Present participle
I/a dog etc.	+	will	+	have	+	been	+	going, doing (verb + ing)

We will have been driving 6 hours by the time I get home.

John will have been trying to find a new job for five months by June.

Note: If duration of an activity (since April, for three hours) is unknown then the Future Continuous should be used instead of the Perfect form.

In negative sentences:

Subject	+	Auxiliary verb	+	Auxiliary verb	+	Auxiliary verb	+	Present participle
I/a dog etc.	+	won't	+	have	+	been	+	going, doing (verb + ing)

She won't have been writing the book for four months by the end of October.

In questions:

Auxiliary verb	+	Subject	+	Auxiliary verb	+	Auxiliary verb	+	Present participle
will	+	I/a dog etc.	+	have	+	been	+	going, doing (verb + ing)

Will he have been writing the composition by the end of February?

How long will you have been learning German in July?

Test your understading

Submitted by Anonymous on Wed, 09/19/2007 - 17:06.

Anonymous

wrong form: it should be VB-ing instead of past participle

Submitted by Mark on Sat, 09/22/2007 - 14:44.

Mark

Alright, I've corrected the mistake.