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He came back from Tokyo to visit his cousin. ( Make the original question.)

1. Why did he come back from Tokyo?

2. What did he come back from Tokyo to do?

3. What did he do when he came back from Tokyo?

Aside from Sentence 1, is either of the next sentences correct?

Forrest from Taiwan
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Hi,

Welcome to the Forum.

He came back from Tokyo to visit his cousin. ( Make the original question.)

1. Why did he come back from Tokyo? OK

2. What did he come back from Tokyo to do? OK

3. What did he do when he came back from Tokyo? No.

Aside from Sentence 1, is either of the next sentences correct?

Best wishes, Clive
Comments  
Thanks a lot, Clive.

I was just wondering if Sentence 2 was incorrect. I typed the sentence on Yahoo search and Google search, and there was no search result with similar usage. It is wonderful to have a kind native speaker like you to confirm that Sentence 2 is correct.

Best wishes,

Forrest from Taiwan