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Asked by David

Present perfect or past perfect.

The two have worked together to write a book.
15 years ago

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Answered by Ms. Sue
http://www.englishpage.com/verbpage/presentperfect.html

15 years ago
Answered by Dylan
Present Perfect
15 years ago
Answered by Abigail
past perfect
15 years ago
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Present perfect or past perfect.

The two have worked together to write a book.

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