但在口语中,ether或neither +of+复数名词时,也可用复数。
4. the number of +复数名词,谓语动词用单数,中心词是number。
5.表时间距离、价格、度量衡等的复数名词或短语作为一个整体看时,用单数(一段时间,一笔钱数,一段距离,一个)
eg. Twenty miles is a long way to walk.
Four hundred dollars is more than she can afford .
6.在四则算式中,谓语动词常用单数(但有时也可用复数)
eg. Five plus five is ten.
Ten times four makes forty.
7.由and连接的并列单数主语的边,如果分别有each, every, no, many a 时,谓语动词用单数。
eg. Every boy and (every) girl in the class is clever.
Each minute and (each) second is valuable to us Mary a student is coming.
8. 由 and连接两个作主语的单数名词指同一人,同一物,同一概念时,其谓语动词用单数形式,这时and后面的名词没有冠词。
eg. -- In this hotel (the) bread and butter ( the bread with butter on it) is served for breakfast.
--The girl's teacher and friend is a young doctor.
9.书名、剧名、报纸名、国名等复数名词作主语时,谓语用单数。
eg. The Arabran Nights is a very interesting story book .
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