初中英语时态总结(八大时态精讲).doc

初中英语八大时态全套精讲

1) 经常性或****惯性的动作,常与表示频度的时间状语连用: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:以上三种情况用于宾语从句中,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。
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。
二. 构成及变化
1、be动词的变化
肯定句:主语+be(am,is,are)+其它。如:I am a boy. 我是一个男孩。
否定句:主语+ be + not +其它。如:He is not a worker. 他不是工人。
一般疑问句:Be +主语+其它。如:-Are you a student? -Yes. I am. / No, I'm not.
特殊疑问句:疑问词+一般疑问句。如:Where is my bike?
2、行为动词的变化
当主语为第一,二人称及复数时,助动词为do
肯定句:主语+动词原形(+其它)。如:We often play basketball after school.
否定句:主语+ don't+动词原形(+其它)。如:we don’t play basketball after school.
一般疑问句:Do +主语+动词原形+其它? 如: Do you often play basketball after school l? Yes, we do. / No, we don't.
特殊疑问句:疑问词+以do开头的一般疑问句? 如: What do you often do after school ?
当主语为第三人称单数时,助动词为does
肯定句:主语+动词三单式(+其它)。如: He swims well.
否定句:主语+ doesn’t+动词原形(+其它)。如:He doesn’t swim well..
一般疑问句:Does +主语+动词原形+其它。如:Does he swim well ?
Yes, he does. / No, he doesn't.
特殊疑问句:疑问词+以does开头的一般疑问句?
如: How does your father go to work?
三、第三人称单数的动词变化规则(只有在第三人称为主语的肯定句中,动词才用三单式)
(1)多数动词直接加s:
runs gets likes collets takes plays climbs…….
(2)结尾是s, x, sh, ch, o,前为辅音字母,结尾加es :
watches teaches goes does washes crosses mixes brushes
(3)动词末尾y前为辅音:将y改为i加es:
study→studies fly→flies carry→carries cry→cries
但在y前如果为元音则直接加s:
buys says
2 一般过去时的用法
1)在确定的过去时间里所发生的动作或存在的状态。
时间状语有:yesterday, an hour ago, the other day, in 1982 yesterday morning (afternoon, evening…) last night (week, month, year…), a moment ago , a week ago, three years ago… just now,等。
Where did you go just now?
2)表示在过去一段时间内,经常性或****惯性的