didn't do sth and haven't do sth Are both structures right? Is there such"haven't did sth”？

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赵微微

2015年4月1日 08:59

No, there isn't. This form doesn't exist. You're confusing two tenses. The past simple is 'I didn't do that'. The present perfect is 'I haven't done that'.

2015年4月1日

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赵微微

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