现在完成时练习一 用since和for填空 1.______ two years 2._______ two years ago.3_______last month 4._____1999 5.______yesterdy 6._____4o'clock 7._____4 hours8._____an hour ago 9._____we were children 10.____-lunch time 11._____she left here
问题描述：
现在完成时练习一 用since和for填空 1.______ two years 2._______ two years ago
.3_______last month 4._____1999 5.______yesterdy 6._____4o'clock 7._____4 hours8._____an hour ago 9._____we were children 10.____-lunch time 11._____she left here
答
1.__for____ two years 2._since______ two years ago
3___since____last month 4. __since___1999 5.__since____yesterdy 6.__since___4o'clock 7.__for___4 hours 8.__since___an hour ago 9.__since___we were children 10. __for__-lunch time 11. __since___she left here
答
1 for
2 since
3 since
4 since
5 since
6 since
7 for
8 since
9 since
10 since
11 since
分析：FOR 后接一段时间； SINCE 接过去的时间点/从句
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