第1个回答 2011-05-02
does,did
plays played
goes went
visits visited
has had
stays stayed
studies studied
sees saw
am->is->was,are->is->were
cleans cleaned
enjoys enjoyed
writes,wrote
第2个回答 2011-05-02
1. does did
2 plays played
3 goes went
4 visits visited
5 has had
6 stays stayed
7 studies studied
8 sees saw
9 is was
10 cleans cleaned
11 enjoys enjoyed
12 writes wrote
第3个回答 2011-05-02
1does did 2plays played 3 goes went 4 visits visited
5has had 6 stays staied 7studies studied 8sees saw 9am/ is/ are was/were
10cleans cleaned 11enjoys enjoyed writes wrote