[析]one作代词时,它的复数形式是ones,所有格形式是one's,反身代词为oneself.如果讲One should do one's best.则是对句。如果one与别的词组成其他词,如: someone, anyone, everyone或only one 则要用his/her,来作其所有格形式。
[误]— Who won the game?— None.
[正]— Who won the game?— No one.
[析]由who提问的句子的否定回答中的简略说法是no one,而由How many提问的句子的否定回答中的简略语是None.如:How many books are there? None.
[误]There are many trees on either sides of the street.
[正]There are many trees on either side of the street.
[正]There are many trees on both sides of the street.
[析]either作代词时由两个含意,其一是两者中随便哪一个,如:You can take either.其二是两者中的每一个。但要注意的是either后要加单数名词,如果作主语则谓语动词也要用单数形式。
[误]I have three sisters. Neither of them is a doctor.
[正]I have three sisters. None of them is a doctor.
[析]neither用于两者中无一是,而none则用于多于两者中的人或事物无一是。
[误]He doesn't like Beijing opera. I don't like too.
[正]He doesn't like Beijing opera, I don't like either.
[析]either作为“也”讲时,要用于否定句中,而too则用于肯定句中。
[误]We like both this little boy.
[正]We both like this little boy.
[析]both作同位语时,它在句中的位置有:在be动词之后,如:We are both students.在实意动词之前,如:The parents both want to go to the cinema.用于第一助动词之后,如:We have both read these English novels.使用时要注意以下句子的实际含意:Both of us are not right.应译为:我们俩不都对。Neither of us is right.才应译为:我俩都不对。又如:I can't give you both of the books.意为:两本书我不能全给你,而I can't give you either of the books.才为:两本书我全不能给你。
[误]We each has a ticket for the concert.
[正]We each have a ticket for the concert.
[析]each作句子主语时其谓语动词要用单数形式,如:Each of us wants to learn English well,但each作同位语时,则应以原名词的数为准。
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