Which sentence correctly uses an adverbial clause with the present ...

★ Grammar of Future Plans

Which sentence correctly uses an adverbial clause with the present perfect tense?

A. Once I have finished dinner, I’ll call you.

B. Once I will have finished dinner, I’ll call you.

C. Once I finished dinner, I’ll call you.

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Select the sentence that uses the correct future perfect structure.

A. They will have finish the project by Friday.

B. They will have finished the project by Friday.

C. They will have finishing the project by Friday.