(1)复合不定代词somebody ,something ,anything, nothing ,everything, everybody等是由some , any ,no ,every, 加上body, thing 构成的,叫做复合不定代词,在句子中当单数使用。
somebody, something, someone 一般用于肯定句中;anything, anybody,anyone一般用于疑问句、否定句和条件状语从句中。修饰复合不定代词的定语,应放在它们的后面。如：Hey,Lily.There is someone outside the door.(嗨,丽丽,门外有人。) /Di(每个人)d you meet anyone when you came to school last Sunday?(上个星期天你来学校时见到什么人了吗?)/He has nothing much to do today.(他今天没有多少事情做)
(2)one与ones用来代替上文的一个或多个人或事物,前面可以加冠词、形容词、指示代词、which等。如： Which jacket would you like, this one or that one?(你要哪件夹克,这件还是那件? / I don’t like the green ones.(我不喜欢绿色的那些)
(3)so可以代替一件事情,作句子的宾语或表语。如： I don’t think so.(我认为不是这样的。) / He lost a book.So did I.(他丢失了一本书,我也是。)
(4)a lot of、lots of、a number of( /large numbers of)、a great deal of、plenty of的区别：五个“名词+介词”短语都表示“大量,许多”,a lot of(或lots of)既可以修饰不可数名词也可以修饰可数名词的复数形式,可以相应地换为much和many;plenty of“足够、大量”,既可以修饰不可数名词也可以修饰可数名词的复数形式。 a number of / large numbers of只可以修饰可数名词复数形式(它修饰的词作主语时谓语用复数形式)可以换为some、many、a lot of、plenty of。 a great deal of只可以修饰不可数名词(它修饰的词作主语时谓语用单数形式)可以换为much。
如：A lot of people think that time is money.(许多的人认为时间就是金钱。) / I don’t have to do it in a hurry because I have plenty of time.(我用不着赶忙,因为我有充足的时间。) / I have a number of letters to write today.(今天我有好多信要写) / I spend a great deal of time/money on shopping.(在购物方面我花费了大量的时间/金钱。)
(5)none、no one、nobody的区别：no one和nobody都表示“没有人”,仅指人,后面不跟of 短语,作主语时谓语用单数形式;none表示“没有一个人/物”,可指人也可以指物,后面可跟of短语,作主语时谓语可用单数也可用复数。如：No one knows how he managed to get the ticket.(没有人知道他是怎样搞到那张票的) / Nobody handed in his/their composition(s) yesterday.(昨天没有一个人交作文。) / None of my friends came to see me that day.(那天没有一个朋友来看我。)
