By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated

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BythetimeJackreturnedhomefromEngland,hisson___fromcollege.A.graduatedB.hasgraduatedC.hadbeengraduati

By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated
By the time Jack returned home from England,his son___ from college.
A.graduated B.has graduated C.had been graduating D.had graduated

By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated
by the time …当……的时候,……
通常引导一个时间状语从句,表示“到……的时候”主句则表示在此时间之前某个事件已完成.值得注意的是,当从句用过去时时,主句通常用过去完成时.
例如：
1.By the time l got to the station,the train had
already gone.
2.By the time l got home,they had already left.
基本上用法只有注意这些了,用惯了就会了

D.had graduated

jack is learning how to tell the time by this clock对this clock 提问 jack is learning how to tell the time by this clock怎么翻译 by the time ,by then the article by JACK是指作者是JACK吗? By the time by the time 用by the time造句! by the time怎么造句? by the time +现在式造句 by the time 的用法 by the time 等于什么? by the time to 谢 by the time什么意思 By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated 1.Jack has gone to school.（用by the time改写）Jack _______ ________ to school by the time I called him.2.The story was very interesting.I could never forget it.The story was ________ _________ ________ I could never forget it.3.I was late for s Jack has a great time in the park.(改为同义句)Jack _____ ______in the park. How did you find the lecture by Jack Smith? in time ,on time ,by the time 的区别,