By the time Billy was 6, he         in the sea.

A．had already swum                       B．was already swimming

C．has already swum                       D．a(chǎn)lready swam

 

【答案】

A

【解析】

試題分析：考查時態(tài)，時間狀語By the time，和前面的句子Billy was 6，可以知道時態(tài)是過去完成時，所以選A，

考點：考查時態(tài)

點評：動詞時態(tài)是高考考查的熱點，需要考生記牢它們的用法及句法，還需有分析理解句子結(jié)構(gòu)的能力。動詞時態(tài)與語態(tài)也是高中階段的重難點之一，需要考生能夠理解句意進而對動詞的時態(tài)做出正確的判斷

即學(xué)即練：— Remember the first time we met, Jim?

— Of course I do. You _______ in the library.

A. have read     B. had read           C. were reading          D. read

選C

 

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