主谓一致 谓语动词的数必须和主语的人称和数一致,这就叫主谓一致.I am a teacher She often does her homework in the morning. There is only one box on the table.There are 50 students in our class.一、谓语动词用单数一一 表示表示时间，数目，距时间，数目，距离，价格，度量衡离，价格，度量衡等名词等名词的复数作主语，并作为整的复数作主语，并作为整体看待时，谓语动词用体看待时，谓语动词用单单数数。1)Four hours is enough to do the 1)Four hours is enough to do the experiment .experiment .2)Ten dollars is too much to pay 2)Ten dollars is too much to pay for that shirt .for that shirt .3)Thirty feet is long enough .3)Thirty feet is long
