Both, either, neither
这三个词都只限用于两者.Both表示“两者都”,是对两者的肯 定.做主语谓语用复数形式.Neither表“两者都不”,是对两者的否 定,做主语视为单数.Both与 neither是一对反义词.Either表“两者 之一”,表肯定,做主语时谓语用单数. eg Both of them are workers. Neither of the answers is correct. There are some trees on either side (or both sides ) of the river. 注意:要把含有both,either的句子改为否定句,只须把both,either改为 neither, eg both of them are in Class Seven.(否定句) Neither is ___of them ____ in Class Seven. Either of the boys is tall. (否定句) Neitherof the boys ____ talll. ____ is
复合不定代词 Something,anything,nothing
Something,anything,nothing的用法和some,any,no的用法 相同.注意:nothing=not anything, 注意:1.做主语时,谓语用第三人称单数形式.Eg there is something on the desk. Something is wrong with your computer. 2.修饰它们的词要放在它们后面.Eg There is nothing important in today’s newspaper. Did he tell you anything funny? 3.表“另外的,其他的”意义时,用else,不用other. Eg: I have nothing else to do. There is nobody else in the room. 类似的词的用法还有:somebody, anybody,nobody 和 some one, anyone,no one ;somewhere, anywhere ,nowhere