4 去掉do
8 breaks变breaking
9 have变has
12 whether变that
15 because变that
16 walks变walking
17 think后加 it
剩下的，你改的正确。
4 去掉do
5 if~whether
7 没有这题?
8 Anyone~Whoever或者Anyone后面加that
9 have前面加that
10 that~what
11 没有这题?
12 whether>that
13 if~whether
14 that~what
15 because>that
16 Who~Whoever
17 think后面加it
你们现在学的是定语从句是吧
4.去掉do
8.anyone后加上 who
9.how can we
15 is his illness
16,最前面加anyone
17.i think it is important that we should learn english well
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