Question

What is the purpose of the future perfect tense?
A) It is used to explain an activity that will be completed by a certain time in the future.
B) It is used to talk about an action that will already have started and will still be happening by a certain time in the future.
C) It is used to express an action that will occur in the future.
D) It is used to project ourselves forward in time and to look back.

Answer 1

Hint: The future perfect is a verb form or construction that is used to express an event that is expected or intended to occur before a future time reference, such as will have finished in the English sentence "I will have finished by tomorrow."

Complete answer:
Let us look at the given options:
A) It is used to explain an activity that will be completed by a certain time in the future: The tense of a phrase reflects the passage of time, whether it is now (present), then (past), or yet to come (future). The tense of a sentence is mostly determined by the verb. The future perfect tense denotes an activity that will take place at a specific moment in the future, or in the future. This is valid since it is comparable to the goal stated in Option A of the form "shall have/will have + verb."
B) It is used to talk about an action that will already have started and will still be happening by a certain time in the future: Option B is wrong because the statement closely corresponds to the future continuous tense of the phrase shall/will be + verb, when the perfect tense is required.
C) It is used to express an action that will occur in the future: Option C's purpose is the simple future tense of the form shall/will + verb, but we need to pick the future perfect tense's purpose, thus option C is wrong.
D) It is used to project ourselves forward in time and to look back: The future perfect continuous tense of the phrase shall/will have been + verb is referred to in option D. It refers to a course of activity that occurs between now and a specific time in the future. Option D is wrong since it does not satisfy the goal of the future perfect tense.

Thus, the correct answer is Option A) It is used to explain an activity that will be completed by a certain time in the future.

Note: The future perfect tense has a simple formula: will have + [past participle]. It makes no difference whether your sentence's topic is solitary or plural. The formula remains unchanged.
The future perfect tense and the simple future tense can be used interchangeably at times. However, if you don't have prepositions like before or by the time to illustrate the order of events, you'll have to use the future perfect to explain what happened first.