短文改错,一共有十处错误每句中最多两个.每处错误仅涉及一个单词的增加、删除和修改.

I went with several of my classmates to play badminton on(去掉on) last weekend.When they (they - we )got to the sports ground,it was full in(in- of) people. We waited patient(patient - patiently) for our turn for an hour. At first,we play (play- played)singles.After about half (加上an)hour,Li Ming suggested playing doubles,but (but- and)we all agreed.Liu Qiang and I was in a team.Both of us tried our best and finally our group beat the other three team(team- teams).From this sports exercise I learned what(what- how) important teamwork is（is- was）.
这是我在静心思考后得出的结论,
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