内容正文:
第06讲 一般现在时
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知识导航
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1.一般现在时的定义及时间状语
2.一般现在时的四种基本句型(肯定句,否定句,一般疑问句和特殊疑问句)
3.
第三人称单数的动词变化规则
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规则变化和不规则变化
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4. 一般现在时的具体用法(基本用法和特殊用法)
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一般现在时
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知识
梳理
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一.一般现在时的定义
表示现阶段经常或习惯性发生的动作或存在的状态,或说明主语的特征。
常用时间状语:often 经常,usually通常,always 总是,every每个,sometimes 有时,at …在几点钟, once / twice a week 一周一次/两次
例句:She is very patient. 她很有耐心。
They go to the Palace Museum once a year. 他们每年去一次故宫。
They often discuss business in the evening . 他们经常在晚上谈生意。
二.一般现在时的构成
构成:①be(am/is /are)+表语; ②实义动词作谓语
1.一般现在时的基本句型结构
构成及变化
例句
be动词的变化:
肯定句:主语+be (am, is, are)+其它。
I am a boy. 我是一个男孩。
否定句:主语+ be (am, is, are) + not +其它。
He is not a worker. 他不是工人。
一般疑问句:Be (am, is, are) +主语+其它?
---Are you a student?
---Yes. I am. / No, I'm not.
特殊疑问句:疑问词+一般疑问句?
Where is my bike?
行为动词的变化:
1. 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)。
We often play basketball after school.
否定句:主语+ don’t+动词原形(+其它)。
We don’t play basketball after school.
一般疑问句:Do +主语+动词原形+其它?
---Do you often play basketball after school?
---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?
What do you often do after school?
2. 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)。
He swims well.
否定句:主语+ doesn’t+动词原形(+其它)。
He doesn’t swim well.
一般疑问句:Does +主语+动词原形+其它?
---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?
How does your father go to work?
【典例分析】
1.He always ________ his mother ________ the housework.
A.help; doing B.helps; doing C.helps; do
2.________ Tom’s father ________ ice-cream?
A.Does; likes B.Does; like C.Do; like D.Do; likes
2.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, collects, 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, dresses, 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......
(4) 不规则变化have和be动词:have-has, be-am / is / are
【典例分析】用所给词的适当形式填空。
1.Linda often ________ (drink) a glass of coffee after lunch.
2.She alw