2. all和both
1) all和both后面的of可有可无。
All / Both (of) the desks are new.
注:Both the desks... = Both of the desks... = Both desks...(the或of the可有可无)
2) 注意下列两种句子里all/both的位置:
They all / both agree with me. I agree with them all / both.
句中all或both直接跟在代词(主格或宾格)之后作同位语;其它不定代词不能这样用。
3) all/both同频度副词一样,可位于句中(主、谓语之间或谓语动词结构之中),如:
They all / both came. They were all / both waiting.
(注;each也能这样用,其它不定代词都不能。)
3. either与neither
either指两者之中任何一个,neither指两者都不通常与单数动词连用。但在非正式英语中也可与复数动词连用。例如:
Youve got two answers. Either is correct. Neither is wrong.
There are trees on either/each side of the street.
Neither of the books is worth reading.(=Neither of the books are worth reading)
4. nobody, no one, nothing和none
nobody和no one指人,作单数,后面不能接of 短语,例如:
Nobody/No one knows why she was late again.
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