she has studied english since she was ten变为否定句.是在has后面直接加not吗,感觉好别扭.

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• she has studied english since she was ten变为否定句.是在has后面直接加not吗,感觉好别扭.
• she has studied english since she was ten变为否定句.是在has后面直接加not吗,感觉好别扭.
• 怎么写?——She （study）English since she was ten.She （begin）to study English when she was ten.是现在完成时?She ————（study）English since she was ten.She —————（begin）to study English when she was ten.两个空空、
• the letter is from（ lucy)对划线部分提问