不定代词的用法

  (1) one与ones:
①one替代上文提及的人或物的单数可数名词,其前可有形容词或冠词等修饰。如:This dress is too large and that one is too small.这件裙子太大了,而那件裙子太小了。
②ones替代上文提及的人或物的复数名词。如:Are they the ones you saw last night? 它们就是昨天晚上你看到的吗?


  (2) both, all, either, neither, no one与none:
①both用于两者之间,意思是“两个都”,作主语时,谓语动词用复数形式。如:My parents are both teachers.我父母都是教师。
②all用于三者或三者以上,意思是“全部的;所有的”,作主语指人说,谓语动词用复数形式;指物时,谓语动词用单数形式。如:All of the students have been to Hefei. 所有的学生都去过合肥。All I want is a room somewhere.我所想要的就是某个地方的一个房间。
③either表示“两者中任何一个”,作主语时,谓语动词用单数形式。如:Either of the two boys is clever.这两个小男孩中有一个很聪明。
④neither表示“两者都不”,作主语时,谓语动词用单数形式。如:Neither of the two girls is fat.这两个小女孩都不胖。
⑤no one用于指人,不能跟of短语。如:No one could cheer him up.没有人给他鼓劲加油。
⑥none指人或事物,常和of短语连用。如:None of my friends wanted to go there. 我的朋友中没有一个想去那里。I wanted to buy you your favorite book, but there was none left in the shop. 我想给你买你最喜欢的书,但商店里没有了。
  (3) few, a few, little与a little:
①few修饰可数名词复数,含有否定的意思。如:Few people like taking a ship.几乎没有人喜欢坐船。
②a few修饰可数名词复数,含有肯定的意思。如:After a few minutes she began to cry again. 几分钟后她又开始哭了。
③little修饰不可数名词,含有否定的意思。如:There is little water in the glass. 玻璃杯里几乎没有水了。
④a little修饰不可数名词,含有肯定的意思。如:Don’t worry. There is a little time left.别担心,还剩有一点时间。