"both girls are pretty"
误 The both children have been to Greece.
正 Both (the) children have been to Greece.
析 形容词both属前位限定词，前面不可以加定冠词，而后面有时则可以。
误 I'm writing to tell both about my life in London.
正 I'm writing to tell you both about my life in London.
正 I'm writing to tell both of you about my life in London.
析both只能指代第三人称,不能指代第一、二人称。
他俩很相像。误 They are both alike.
正 They are alike.
析 代词both不能和alike,as well as,at once,between,equally等连用。
误 Both expert and red students are admired.
正 The students who are both expert and red are admired.
析both...and...连接两个形容词时,不可用作定语修饰同一个名词,但可用作表语。
