问题描述：
改为否定句：1.Both of the brothers work as farmers.
改为否定句：
1.Both of the brothers work as farmers.
2.He reads English every morning.
3.It is necessary for him to improve his handwriting.
4.The stuents have done everything for the meeting.
改为否定句：
1.Both of the brothers work as farmers.
2.He reads English every morning.
3.It is necessary for him to improve his handwriting.
4.The stuents have done everything for the meeting.
问题解答：
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