2015年衛(wèi)生類職稱英語語法：主動句轉換為被動句

主動句變?yōu)楸粍泳涫峭ㄟ^這樣轉換而實現(xiàn)的：

1.把主動句的賓語轉換為被動句的主語；

2.把主動句的謂語換成被動語態(tài)；

3.把主動句的主語前加by構成短語，放在被動語態(tài)的謂語之后。此by…短語根據(jù)需要而定，有時可以省略。

注：

①帶有介詞或副詞的短語動詞，如call on， carry out， look after， take care of等用被動語態(tài)時，應視為不可分割的一部分，后面的介飼或副詞不能丟掉，如：

主動句：Grandma looks after my younger brother well.

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

接下來我們一塊來分析幾個選自《職稱英語等級考試用書》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.