2020届高考英语语法专题复习 语法剖析---三种时态

一般现在时谓语形式(1)谓语是系动词be。(2)谓语是行为动词。一般现在时句中，如果主语是第三人称时，动词要进行变化：①一般情况下，动词后面直接加-s。例如：works,gets,says,reads②以ch,sh,s,x或o结尾的动词，在后面加-es。例如：goes,teaches,wases③以辅音字母+y结尾的动词，把y变为i再加-es。例如：studies,tries,carries用法

用法

例句表示经常性、习惯性的动作及现在存在的特征或状态；常与表示频度的时间状语连用。she is often late for school. i leave home for school at 7 every morning.表示客观规律、正确事实或科学真理、格言及客观存在。the earth moves around the sun.failure is the mother of success.all the living things on the earth depend on the sun.表示主语现在的状态、能力、性格或个性。the boy is always ready to help others.he writes good english but does not speak well.表示计划或安排要做的动作（有时间状语）,限于begin,come,leave,go,arrive,start,move,stop,open,close,return等一类动词。the plane takes off at ten o’clock.they leave for shanghai next sunday.the film starts at eight o’clock this evening.在有连词if,un