表示经常发生的动作或存在的状态.pdf

语 法 卡 片一般现在时No. 02 1. 定义表示经常发生的动作或存在的状态, 如能力 , 特征, 性质, 身份等 2. 构成 1)be--is,am,are 2)实意动词用原形表示 ( 注意当主语为第三人称单数时, 动词+s 或+es) 句型转换 1) 情态动词 , 连系动词提前或直接在其后加 not 2)实意动词加 do/dos 或 don't/doesn't 3. 用法 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 Sunday I 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. 第一句用一般现在时，用于操作演示或指导说明的示范性动作，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 4． 一般现在时表将来 1）下列动词： come, go, arrive, leave, start, begin, return 的一般现在时表将来 这主要 用来表示在时间上已确定或安排好的事情 The train leaves at six tomorrow morning. When does the bus star? It stars in ten minutes. 2）倒装句，表示动作正在进行，如： Here comes the bus. = The bus is coming. There goes the bell. = The bell is ringing. 3）在时间或条件句中。

When Bill comes (不是 will come), ask him to wait for me. I'll write to you as soon as I arrive there. 4）在动词 hope, take care that, make sure that 等后 I hope they have a nice time next week. Make sure that the windows are closed before you leave the room. 语 法 卡 片一般现在时No. 02 5．用一般过去时代替完成时 1)两个动作如按顺序发生，又不强调先后，或用then，and，but 等连词时，多用 一般过去时 When she saw the mouse ，she screamed. My aunt gave me a hat and I lost it. 2 ) 两个动作相继发生，可用一般过去时；如第一个动作需要若干时间完成，用过 去完成时 When I heard the news, I was very excited. 3)叙述历史事实，可不用过去完成时，而只用一般过去时。

Our teacher told us that Columbus discovered America in 1492. 6．一般现在时代替将来时 时间状语从句，条件句中，从句用一般现在时代替将来时 When, while, before, after, till, once, as soon as, so long as, by the time, if, in case (that), unless, even if, whether, the moment, the minute, the day, the year, immediately He is going to visit her aunt the day he arrives in Beijing. 他一到北京，就去看他姨妈 典型例题 (1).He said he________me a present unless I_______ in doing the experiment. A. had not given; had not succeededB. would not give; succeed C. will not give; succeedD. would not give; will succeed. 答案 B. 在时间，条件或让步主语从句中一般不用将来时。

本题有He said，故为过 去式主句用将来时，故选B. 此处用一般过去式代替了过去将来时 (2) 表示现在已安排好的未来事项，行程等活动 The museum opens at ten tomorrow. 博物馆明天 10 点开门 (实际上每天如此 ) 7． 一般现在时代替完成时 1) 有些动词用一般现在时代替完成时： hear, tell, learn, write , understand, forget, know, find , say, remember. I hear (= have heard) he will go to London. I forget (=have forgotten) how old he is. 2) 句型 “ It is ⋯ since ⋯“代替“It has been ⋯ since ⋯“ It is (= has been) five years since we last met. 8． 一般现在时代替进行时 1) 句型：Here comes ⋯ ； There goes ⋯ Look, here comes Mr. Li. 9. 一般现在时代替过去时 1 )“书上说 “，“报纸上说 “等。

The newspaper says that it's going to be cold tomorrow. 报纸上说明天会很冷的 2) 叙述往事，使其生动 Napoleon's army now advances and the great battle begins. 。