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4．在使役動(dòng)詞makr及感官動(dòng)詞see ，hear….等動(dòng)詞的被動(dòng)語(yǔ)態(tài)形式后面出現(xiàn)的作主語(yǔ)補(bǔ)足語(yǔ)的不定式須加不定式符號(hào)“to•
The teacher made Tom answer it again.（主動(dòng)語(yǔ)態(tài)，不加“to )
Tom was made to answer it again.（被動(dòng)語(yǔ)態(tài)，加“to )
5.短語(yǔ)動(dòng)詞的被動(dòng)語(yǔ)態(tài)要注意不可丟失其附加的介詞、副詞或短語(yǔ)。
look at，laugh at，send for，call on，carry out， listen to，take care of ,make use of,depend on，pay attention to，hand in，put on，look up，give up〕等.
6. be＋過(guò)去分詞可以是被動(dòng)語(yǔ)態(tài)形式，也可以是系表結(jié)構(gòu)形式。區(qū)別是，系表結(jié)構(gòu)表示主語(yǔ)狀態(tài)或特征，不帶by短語(yǔ)；而被動(dòng)語(yǔ)態(tài)是表示主語(yǔ)的一個(gè)被動(dòng)動(dòng)作，可以帶by短語(yǔ)。
The job was well done.（系表結(jié)構(gòu)）
The job was well done by a skilled worker.（被動(dòng)語(yǔ)態(tài)）
The composition is well written.（系表結(jié)構(gòu)）
The composition is written with great care;.（被動(dòng)語(yǔ)態(tài)）
7．原來(lái)主動(dòng)語(yǔ)態(tài)中的賓語(yǔ)如果是從句，變?yōu)楸粍?dòng)語(yǔ)態(tài)時(shí)，要用形式主語(yǔ)it.
It has been known to him that many friends will come to see him.
It is said that this book has been translated into several languages.
8．有一些動(dòng)詞不能用被動(dòng)語(yǔ)態(tài)。
break out，take place，happen，belong to，cost，suit，fit，have，let, wear, weigh. suffer, pass, kill the time, enter, last, meet（遇見），join（參加），fail等
9．賓語(yǔ)為反身代詞時(shí)，不用被動(dòng)語(yǔ)態(tài)，只用主動(dòng)語(yǔ)態(tài)形式。
The man introduced himself as Mr. Wang.
10．有些動(dòng)詞或情態(tài)動(dòng)詞常用所接的不定式來(lái)表示被動(dòng)意義。
如：happen，pretend，seem，used to，ought to，appear等。
The house used to be painted white.
The job has to be done before dark.
On the way we happened to be caught in the rain.
11．有些動(dòng)名詞在want, need, require和介詞worth后形式為主動(dòng)，意義為被動(dòng)。
12．有些動(dòng)詞用主動(dòng)形式來(lái)表示被動(dòng)意義。如：clean, sell,look，lock，open，write，read，wash,feel等。
This kind of cloth washes easily.
These books sell well.（好賣）
