call in/call on/call off
1. 拜访
I shall call on you next week.
我下星期去看你。
2. 号召;请求
You'd better call on your friends to help you.
你最好请朋友来帮你。
2,call in
1. 请求收回;请来
3,call off
1. 取消
Why was the football match called off?
上一篇： 中考英语易混词语用法讲解：turn+介词
下一篇： 中考英语易混词语用法讲解：hand+介词