1 to 改成 for
2 do 改成 does
3 going to play 改成 playing
4 I and Tom 改成 Tom and I
5 your 改成 yours
6 in 改成 for
7 doing 改成 do
8 in 改成 on
9 去掉 the
10 去掉 to
11 joined 改成 has been in
12 months 去掉 s
13 in 改成 on
14 to do 改成 on
15 say 改成 speak
16 in 改成 from
17 before 改成 after
18 have 改成 has
19 win 改成 won
20 are 改成 is