2013届高考英语 语法专题复习 Unit 1 Lifestyles教案7 北师大版必修1VIP专享

北师大版 语法·剖析（Unit 1 Lifestyles语法·剖析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,unless,before,when,as soon as,once,however 等引起的时间（条件、让步）状语从句,需用一般现在时表示将来。If you work hard,you’ll succeed in passing the exam.We’ll go out for a walk as soon as the rain stops.一般现在时还可用在戏剧、电影的剧本解说、体育比赛的解说以及图片的说明等场合。Tom carries the ball to the left.The picture shows us how they built the motorwaylast year.现在进行时构成：动词原形-ing(1)一般情况在动词原形后加-ing。例如：go—going,stand—standing(2)以不发音的 e 结尾的动词，去掉 e,再加-ing。例如：arrive—arriving(3)少数几个以-ie 结尾的动词，须将 ie 变成 y,再加-ing。例如：die—dying lie—lying(4)以元音+辅音结尾的重读闭音节，双写辅音字母，再加-ing。例如：stop—stopping用法用法例句表示现在（指说话人说话时）正在发生的事情。Tom is playi...