考研英語的語法速成：代詞的指代

　　1.that的指代作用

　　that指代不可數名詞和單數可數名詞(如是復數，用those)，后面通常跟有修飾語，如出現在比較結構中的that of。如

　　Conversation calls for a willingness to alternate the role of speaker with that of listener, and it calls for occasional digestive pauses by both.這里that指代前面的the role。

　　No bread eaten by men is so sweet as that earned by his own labor.

　　2.one的指代作用

　　one指代帶不定冠詞的單數可數名詞，復數為ones。the one指代帶定冠詞的單數可數名詞。如：

　　A good writer is who can express the commonplace in an uncommon way.

　　[A] that [B]he [C]one [D]this

　　答案為[C]

　　3.do的替代作用。

　　do代替動詞，注意數和時態的變化。如：

　　For him to be re-elected, what is essential is not that his policy works , but that the public believe that it does.