51 both的用法
1 both 应放在be动词、助动词和情态动词的后面,但要放在行为动词的前面。
They are both students. (正)他们俩都是学生 。
They both are students. (误)
2 both 可以直接修饰名词,如both workers(两个工人),both brother and sister(兄妹俩)。但是,如果both 和定冠词、形容词性物主代词、数词共同修饰名词,结构为:both +修饰词+名词。
both the workers那两个工人
both my feet我的两只脚
both the two brothers那兄弟俩
both her hands她的两只手
Both the glasses are broken. (正)那两只玻璃杯都破了 。
The both glasses are broken. (误)
3 both 同主格代词和宾格代词连用时,要放在后面。
They both like the film. 他们两人都喜欢这部电影。
He lent the books to them both . 他把书借给了他们两人。
3 both of 后接代词时,要用宾格,后接名词时,名词前必须有定冠词、物主代词所有格或其他表示特指意义的限定词。
Both of them work in the factory. 他们俩都在这家工厂工作。(=They both work...)
Both of the books are hers. 这两本书都是她的。(=The books are both...)
Both of his parents are doctors. 他父母都是医生。(=His parents are both...)
Both of these story-books are worth reading. 这两本故事书都值得读。