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四、名词或代词作主语时和谓语之间的单复数的一致问题： 1.谓语和谓语基本保持单复数的一致,即：主语是可数名词单数或不可数名词时,谓语动词用单数形式：如：The computer was a great invention.The water in the glass is very cold. 2.集体名词做句子主语时, ① 如果表示整体概念,则谓语用单数形式,如：Class Three is a very good class. ② 如果表示其中的所有成员时,则谓语用复数形式,如：Class Three have a map of China. 3.Chinese, Japanese, fish, sheep, people等表示单个时谓语用单数,表示许多时,谓语用复数。如：There is a sheep in the yard. / There are some sheep in the yard. 4.maths, news等虽然有s结尾,但不是复数,因此谓语仍用单数：The news is very exciting. 5.glasses, shoes, socks, trousers, gloves等名词往往用复数形式,故谓语用复数。如： The trousers are very cheap and I want to take them. 6.a lot of 后跟名词复数时谓语用复数形式,跟不可数名词时谓语用单数形式。如：A lot of students are playing baseball now. A lot of time was wasted on that work. 7.and 连接两个名词做主语时,谓语原则上用复数,但是两个名词若构成一个整体事物时,谓语则用单数。如：The teacher and his son are picking apples now. / Fish and chips is very famous food. | 
