Page 51 - Grasp English B1+ (Grammar Book)
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Expectations 8
Future perfect tense
Future perfect tense is formed as:
subj. + will have + V3 (past participle)
We use future perfect tense to talk about:
• completed actions before something or a specific time in the future:
We won’t have left the building before the experts arrive.
They will have revealed all the secrets about the incident by tomorrow.
• duration before something or a specific time in the future (with stative verbs):
I’ll have been a professional scuba diver by the end of this summer.
The future perfect and continuous tenses are commonly used with the following conjunctions:
when
by + a time phrase
by the time + sentence (present simple)
Grasp English B1+ Grammar Book © Prime Press, 2021 | www.primepress.com 49
