一般现在时: 表示现在经常反复发生的动作、存在的状态或习惯性的动作的时态。可概括为 ①经常性或习惯性动作; ②长期存在的特征或状态; ③普遍真理、客观事实等。 构成: 一般现在时用行为动词的原形,但第三人称单数作主语时,动词的词尾要加-S。 a. 表示经常性或习惯性的动作。 例:Li Ming always helps the old man. 李明一直帮助这位老人。 We usually go to school on foot. 我们通常步行上学。 They sometimes go fishing on Sundays. 他们有时周日去钓鱼。 b. 表示永恒不变的事实或真理。 例:A bird flies with wings. 鸟用翅膀飞翔。 c. 用在格言、谚语中。 例:Pride goes before a fall. 骄者必败。
一般现在时具体用法: 1.表示经常的或习惯性的动作,常与表示频率的时间状语连用。 时间状语: always,usually,every morning/night/evening/day/week/year,often,sometimes, occasionally,from time to time,twice a week,rarely,seldom,once a month,hardly,ever,never. e.g: I leave home for school at 7:00 every morning.
2.表示主语具备的性格、能力、特征和状态。 e.g: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.
3.表示客观事实和普遍真理。 e.g :The earth moves around the sun. Shanghai lives in the east of China.
9表示格言或警句中。 e.g 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.. 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。
一般现在时的特殊用法: 一些动词可用一般现在时来表达现在进行时: verbs of the senses: hear,see,taste,smell,feel verbs of the thinking: believe,know,mean,realize,think,remember verbs of the linking: dislike,fear,heat,like,love,want verbs of the possession: belong,have,own,possess
考点名称:动名词
动名词: 如果一个动词加上了-ing变成了名词,那么这个词称动名词。 动名词是一种兼有动词和名词特征 的非限定动词。它可以支配宾语,也能被副词修饰。动名词有时态和语态的变化。 例:Reading is an art. 读书是一种艺术。 Swimming is a good sport in summer. 游泳是夏天一项好的运动。 There is no saying when he'll come. 很难说他何时回来。 No smoking. (=No smoking is allowed here) . 禁止吸烟! No parking. 禁止停车! Let’s go shopping. 让我们去购物。
动名词常见题型: 1)动名词做主语时,谓语动词为单数 2)在动名词和不定式中,作为介词的宾语是动名词 3)动名词的否定直接在其前加否定词,通过代词的宾格或所有格形式给出逻辑主语 例: I would appreciate_______ back this afternoon. A.you to call B.you call C.you calling D.you’re calling (Key:C;换成your calling也对) 4)有些词后只能接动名词 acknowledge;admit; advise;advocate;allow;appreciate; avoid; celebrate; consider; contemplate; defer; delay; deny; detest; discontinue; dislike; dispute; enjoy; it entails; escape; excuse; explain; fancy; feel like; finish; forgive; can’t help; hinder; imagine; it involves; keep; it means; mention; mind; miss; it necessitates; pardon; postpone; practice; prevent; recall; report; resent; resist; risk; suggest; understand... 5)另外还有一些接-ing形式的常用说法 it’s no good; it’s no/little/hardly any/ use; it’s not/hardly/scarcely use; it’s worthwhile; spend money/time; there’s no; there’s no point in; there’s nothing worse than; what’s the use/point... 6)有些词后面加不定式和动名词均可 remember,forget,try,stop,go on,continue,stop,regret,cease,mean后面均可用不定式和-ing形式,但意义截然不容。 例: remember to do/doing: ①I remembered to post the letters.(指未来/过去未来将要做的动作) ②I remembered posting/having posted the letters.(我记得做过这个动作) forget与remember的用法类似。 regret的用法: ①I regret to inform you that…(我很遗憾地通知你……) ②I regretted having left the firm after twenty years.(为了“二十年前的离开”而遗憾。) try to(努力)与try +–ing(试验): ①You really must try to overcome your shyness. ②Try practicing five hours a day.