|
3．both [b+uI] 的基本用法 1)both 用作连词。通常与and连用，构成“both…and…”形式，意为“……和……两者都”，使用时，both和and后面一般都跟着相同词类的词。例如： ① She both plays the piano and sings. (both+ 动词+ and+ 动词) 她既弹钢琴，也唱歌。 ② She plays both the piano and the guitar. (both+名词；and+名词) 她既弹钢琴，也弹吉他。 2)both用作代词。常位于连系动词之后，或实义动词之前；但若当动词是由几个部分组成时，both则放在第一个助动词之后。此外，它可用作主语。如： ①They are both absent. (同位语)他们俩都缺席。 ②They both agree to stay. (同上)他们俩都同意留下来。 ③We have both studied French. 我们两个人都学习过法语。 3)both还可作形容词。其用法和either相似，但both后面接复数名词，either后面只接单数名词。如： ①New cities came into being on both sides of the Great Wall. (=New cities came into being on either side of the Great Wall.) 长城的两边出现了崭新的城市。 4)both的全部否定，应用neither或not…either；而both…not却是部分否定。如： ①Neither of them was in good health, but both worked very hard. (=Either of them was not in good health, but both worked very hard.) 他们俩身体都不好，但都努力地工作。 ②Both of them are not teachers. 他们俩并非都是教师。 (责任编辑：admin) |