What is the correct future perfect sentence? A. By ...

★ Grammar of Future Plans

What is the correct future perfect sentence?

A. By next year, I will completed my degree.

B. By next year, I will have completed my degree.

C. By next year, I will completing my degree.

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Which sentence uses the future perfect tense correctly?

A. She will have finish her book by next week.

B. She will have finishing her book by next week.

C. She will have finished her book by next week.