使用被動(dòng)語態(tài)應(yīng)注意：

　　1、不及物動(dòng)詞無被動(dòng)語態(tài)。

　　What will happen in 100 years.

　　The dinosaurs disappeared about 65 million years ago.

　　2、有些動(dòng)詞用主動(dòng)形式表示被動(dòng)意義。

　　This pen writes well.

　　This new book sells well.

　　3、感官動(dòng)詞或使役動(dòng)詞使用省略to的動(dòng)詞不定式，主動(dòng)語態(tài)中不帶to ，但變?yōu)楸粍?dòng)語態(tài)時(shí)，須加上to 。

　　例：make somebody do something→somebody+ be +made to do something

　　see somebody do something→somebody +be +seen to do something

　　A girl saw my wallet drop when she passed by.→My wallet was seen to drop by a girl when she passed by.

　　The boss made the little boy do heavy work.→The little boy was made to do heavy work by the boss.