**章介词与冠词
一、 **难点精讲
1. about和on表示“关于”的区别
2. across, through, over, cross和past
3. after和behind都可以表示“在……后面”
4. after和in能否都表示“在……后”
5. at, in和on表示时间时怎样区别
6. at, in, on, beside, by 和 near表示地点时怎样区别
7. at home, at school和in school
8. at night和in the night
9. at table和at the table
10. at the end of, by the end of, in the end和to the end
11. at the front和at the back等有关词组的用法
12. at work和at rest