both (两者都)
either(两者中任何一个)
both与复数连用,either与单数连用。
Both the boys are clever. 两个男孩都很聪明。
Either of the two boys is clever. 两个男孩都很聪明。
二者常用的结构不同:
both...and...
either...or...
例句:
Either she or you are to be blamed for what has happened.
Some areas are congested with both cars and people.
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