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主要語法：被動(dòng)語態(tài)
英語動(dòng)詞有主動(dòng)語態(tài)和被動(dòng)語態(tài)兩種，當(dāng)主語是動(dòng)作的發(fā)出者，動(dòng)詞用主動(dòng)語態(tài);當(dāng)主語時(shí)動(dòng)作的承受者，動(dòng)詞要用被動(dòng)語態(tài)。只有及物動(dòng)詞才有被動(dòng)語態(tài)。
1. 被動(dòng)語態(tài)的構(gòu)成：
被動(dòng)語態(tài)由“be+過去分詞”構(gòu)成。
如：I clean the window.(主動(dòng))
The window is cleaned by me.(被動(dòng))
根據(jù)時(shí)態(tài)的不同，被動(dòng)語態(tài)中的be動(dòng)詞可以有各種變化：
時(shí)態(tài) 主動(dòng)句 被動(dòng)句 be 的變化
一般現(xiàn)在時(shí) He cleans the window. The window is cleaned by him. is
一般過去時(shí) He cleaned the window. The window was cleaned by him. was
一般將來時(shí) He will clean the window. The window will be cleaned by him. will be
現(xiàn)在進(jìn)行時(shí) He is cleaning the window. The window is being cleaned by him. is being
過去進(jìn)行時(shí) He was cleaning the window. The window was being cleaned by him. was being
現(xiàn)在完成時(shí) He has cleaned the window. The window has been cleaned by him. has been
過去完成時(shí) He had cleaned the window. The window had been cleaned by him. had been
將來完成時(shí) He will have cleaned the window. The window will have been cleaned by him. will have been
進(jìn)行時(shí)較少用被動(dòng)語態(tài)。
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