对与错?
1. Let me know if you interested.2. Let me know if you were interested.
3. Let me know if you were interested in.
4. Let me know if you are interesting.
1. incorrect: missing verb (example Let me know if you are interested)
2. correct.
3. incorrect: incomplete. interest in...what?
4. correct. 没看懂.... 呵呵，小儿科
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