both … and …:两者都,谓语动词用复数形式
如:Both his father and his uncle are very tall.
【拓展】
- not only A but also B :不仅…而且…
- either A or B :或者…或者…,要么…要么…
- neither A nor B :既不…也不…
这三组连词连接A 和 B 做主语成分时,谓语单复数由B 决定 ,这叫就近原则。
not only A but also B:不仅…而且…
Not only I but also Tom and Mary are fond of watching television.
不仅我,而且汤姆和玛丽都喜欢看电视。
The Americans and the British not only speak the same language but also share a large number of social customs.
英国人和美国人不但语言相同,而且有很多相同的风俗习惯。
I know not only English but also Russian.
A gas changes not only in shape but also in volume.
either A or B:或者…或者…,要么…要么…
Either you or I am to go. 你或我必须有人去。
Either he or you are right. 要么他对,要么你对。
Either you’ll leave this house or I’ll call the police. 你要是不离开这座房子,我就叫警察来。
neither…nor…:既不…也不…
① 当neither…nor…连接两个主语时,也应遵循”就近原则”。例如:
Neither dad nor mum is at home today. 今天父母都不在家。
② 若将neither…nor…句型变为肯定句,只需把neither…nor…改为both…and…即可,同时谓语动词必须用复数形式。例如:
Both dad and mum are at home today. 今天父母都在家。
③ 还可以单独使用neither作主语,表示”两者中没有一个”。例如:
Neither of them likes football. 他们俩都不喜欢足球。
④ neither或nor还有另外一种用法,就是当表达一个人没有做某事,另一个人也没做同一类事时,可用neither或nor进行简略回答,其结构为:Neither / Nor+助动词 / 情态动词 / be动词+主语。例如:
He doesn’t go to school by bike. Neither / Nor do I. 他不是骑自行车上学,我也不是。
They didn’t go to the park yesterday. Neither / Nor did we. 昨天他们没去公园,我们也没去。
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