Question

Which of the following is an example of the future perfect tense?
A.
You must finish the test by three o'clock.
B.
You will have finished the test by three o'clock.
C.
You had finished the test by three o'clock.
D.
You are finishing the test by three o'clock.

Answer 1

Answer:

b) you will have finished the test by three o' clock

Answer 2

Answer:

B

Explanation:

A: here there is verb finish ie, 1st form of verb. Hence it's a present tense

C:Here there is helping verb had that is used in past tense. The sentence forms on structure Sub + had +3rd form of verb +obj + point of time

that is structure of Perfect past

D:here there's verb finishing with helping verb are, it's present continuous tense

B: Future perfect tense has a structure of Sub + will have + obj + point of time.

Hence B is the correct option