高中英語語法分類歸納、練習(xí)與分析（精華版）

　　高考英語語法分類歸納、練習(xí)與分析（精華版）

　　一．Tenses and voices

　　A. 現(xiàn)在完成時: 1)表示過去某時發(fā)生的行為對主語目前產(chǎn)生的影響。即用過去發(fā)生的某個行為來說明現(xiàn)在的某種情況。往往含有"已經(jīng)……", "已經(jīng)……了"的意思。

　　Eg.Don't think any more about it. I have decided not to help you.

　　I have experienced that before, so I know how to deal with it.

　　2) 到目前為止已發(fā)生的。與so far, up till now, in the past/ last …….days/ years, today, this month/ year 等 "包括現(xiàn)在在內(nèi)的時間狀語"連用。

　　My brother is an actor. He has appeared in several films so far.

　　Great changes have taken place in this area in the recent years.

　　3）表示過去開始的動作或狀態(tài)延續(xù)到現(xiàn)在。與for…/ since 連用。

　　He has worked in the south for ten years/ since ten years ago.

　　Compare(1):完成進(jìn)行時表示過去開始的動作一直在進(jìn)行，直至現(xiàn)在。

　　He has been working on this project since last month.

　　(2) 過去時態(tài):指發(fā)生在過去某段時間內(nèi)的事。

　　He once worked in the south for ten years (現(xiàn)在不在南方)

　　(3) 過去完成時態(tài):指發(fā)生在過去某個時間以前的動作或狀態(tài)。常與by/ by the end of..(到了……的時候"連用。例如：

　　1）By the time we got to the theatre, they had sold all the tickets.

　　2）How many words had you leaned by the end of last year?

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