21天搞定英語四六級閱讀理解 點擊加入

　　21.7 情態動詞+ have +過去分詞

　　1) may(might) have + done sth, can (could) have + done sth　表示過去，推測過去時間里可能發生的事情。

　　Philip may (might) have been hurt seriously in the car accident.

　　Philip can (could) have been hurt seriously in the car accident.

　　2)　must have +done sth，對過去時間里可能發生的事情的推測，語氣較強，具有"肯定"，"諒必"的意思。

　　---Linda has gone to work, but her bicycle is still here.

　　---She must have gone by bus.

　　3) ought to have done sth, should have done sth

　　本應該做某事，而事實上并沒有做。否定句表示"不該做某事而做了"。

　　You ought to (should) have been more careful in this experiment.

　　He ought not to have thrown the old clothes away.(事實上已扔了。)

　　ought to 在語氣上比should 要強。

　　4) needn't have done sth　 本沒必要做某事

　　I dressed very warmly for the trip, but I　needn't have done so. The weather was hot.

　　5) would like to have done sth　 本打算做某事

　　I would like to have read the article, but I was very busy then.

掃描/長按二維碼可幫助學習46級考試

了解四六級考試動態

了解四六級歷年真題

了解四六級考試技巧

了解作文聽力等資料

萬題庫下載 | 微信搜索"萬題庫英語四六級考試"

　　相關推薦：

　　英語四六級考試時間 | 英語四級作文 | 六級作文

　　歷年大學英語四級考試真題聽力(含MP3)匯總

　　歷年大學英語四級真題及答案|解析|估分|下載

　　歷年大學英語六級真題及答案|解析|估分|下載

　　歷年大學英語六級考試聽力下載(原文+MP3)匯總

　　大學英語四級考試真題 | 英語六級考試真題答案