By the time Billy was 6, he in the sea.
A. had already swum
B. was already swimming
C. has already swum
D. already swam
By the time Billy was 6, hein the sea.A. had already swumB. was already swimmingC. has alr
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解决时间 2021-12-22 11:30
- 提问者网友:泪痣哥哥
- 2021-12-21 12:34
最佳答案
- 五星知识达人网友:十鸦
- 2021-12-21 12:43
(答案→)A. had already swumB. was already swimmingC. has already swumD. already swam解析:考查时态。By引导的时间状语从句与完成时连用,如果by后面的时间是现在的时间,那么使用现在完成时;如果By后面的时间是过去的时间,使用过去完成时;如果by后面的时间是将来的时间,使用将来完成时。本题By后面的时间是the time Billy was 6,表示的是过去的时间,故使用过去完成时。句意:当Billy6岁的时候,他已经能够在海里游泳了。故A正确。
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- 1楼网友:老鼠爱大米
- 2021-12-21 13:47
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