2015年衛(wèi)生類(lèi)職稱(chēng)英語(yǔ)語(yǔ)法：主動(dòng)句轉(zhuǎn)換為被動(dòng)句

主動(dòng)句變?yōu)楸粍?dòng)句是通過(guò)這樣轉(zhuǎn)換而實(shí)現(xiàn)的：

1.把主動(dòng)句的賓語(yǔ)轉(zhuǎn)換為被動(dòng)句的主語(yǔ)；

2.把主動(dòng)句的謂語(yǔ)換成被動(dòng)語(yǔ)態(tài)；

3.把主動(dòng)句的主語(yǔ)前加by構(gòu)成短語(yǔ)，放在被動(dòng)語(yǔ)態(tài)的謂語(yǔ)之后。此by…短語(yǔ)根據(jù)需要而定，有時(shí)可以省略。

注：

①帶有介詞或副詞的短語(yǔ)動(dòng)詞，如call on， carry out， look after， take care of等用被動(dòng)語(yǔ)態(tài)時(shí)，應(yīng)視為不可分割的一部分，后面的介飼或副詞不能丟掉，如：

主動(dòng)句：Grandma looks after my younger brother well.

被動(dòng)句：My younger brother is well looked after （by my grandma）

接下來(lái)我們一塊來(lái)分析幾個(gè)選自《職稱(chēng)英語(yǔ)等級(jí)考試用書(shū)》上的句子：

1.Cement was seldom used in building during the Middle Ages.

2.Dyslexia first was recognized in Europe and the United States more than 80 years ago.

3.However,research has shown that dyslexia is more common in males than in females,and it is found more often in persons who are left-handed.