雅思and所连接的两个单数名词作主语，指同一人、同一件事或同一概念时，其谓语动词用单数。例如：My best friend and adviser has changed his mind again.Bread, butter and eggs is typical American Breakfast .If law andsgroupsis not preserved, neither the citizen nor his property is safe.如果不能维持治安，公民和他的财产都不安全。表示时间、距离、重量、体积、金钱的复数名词，作主语时作为整体来看待，谓语动词通常用单数。【例如】Five thousands dollars is quite a large sum of money to me.Fifty miles is too long a distance for one to walk on foot.Ten years has passed but he didn't change at all.雅思
雅思1) 经常性或习惯性的动作，常与表示频腮度的时间状语连用。时间状语： every…, sometimes, at…, on SundayI leave home for school at 7 every morning.2) 客观真理，客观存在，科学事实。The earth moves around the sun.Shanghai lies in the east of China.3) 表示格言或警句中。Pride goes before a fall. 骄者必败。注意：此用法如果出现在宾语从句中，即使主句是过去时，从句谓语也要用一般现在时。例：Columbus proved that the earth is round..4) 现在时刻的状态、能力、性格、个性。I don't want so much.Ann Wang writes good English but does not speak well.比较：Now I put the sugar in the cup.I am doing my homework now.句用一般现在时，用于操作演示或指导说明的性动作，表示言行的瞬间动作。再如：Now watch me, I switch on the current and stand back. 第二句中的now是进行时的标志，表示正在进行的动作的客观状况，所以后句用一般现在时。雅思</p 产品：澳博培训供货总量：不限产品价格：议定包装规格：不限物流说明：货运及物流交货说明：按订单
