一般現(xiàn)在時(shí)英語(yǔ)語(yǔ)法大全
一般現(xiàn)在時(shí)
A、當(dāng)謂語(yǔ)是be動(dòng)詞時(shí)，構(gòu)成為：主語(yǔ)+be動(dòng)詞( am, is, are )+其他。
如：I am a student.
B、當(dāng)謂語(yǔ)是行為動(dòng)詞時(shí)，構(gòu)成有兩種：
(1)主語(yǔ)(非第三人稱單數(shù))+動(dòng)詞原形+其他。
如：We often watch TV at the weekends.
(2)主語(yǔ)(第三人稱單數(shù))+動(dòng)詞第三人稱單數(shù)形式+其他。
如：Jim usually goes to the park on Sundays.
C、句型變換：
肯定句、否定句、一般疑問(wèn)句及回答
They watch TV at six every day.
They don’t watch TV at six every day.
Do they watch TV at six every day?
Yes, they do. / No, they don’t.
She watches TV at six every day.
She doesn’t watch TV at six every day.
Does she watch TV at six every day?
Yes, she does. / No, she doesn’t.
一般現(xiàn)在時(shí)的用法
1) 經(jīng)常性或習(xí)慣性的動(dòng)作，常與表示頻度的時(shí)間狀語(yǔ)連用。
時(shí)間狀語(yǔ)： every…, sometimes, at…, on Sunday
I leave home for school at 7 every morning.
2) 客觀真理，客觀存在，科學(xué)事實(shí)。
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. 驕者必?cái) ?/p>
注意：此用法如果出現(xiàn)在賓語(yǔ)從句中，即使主句是過(guò)去時(shí)，從句謂語(yǔ)也要用一般現(xiàn)在時(shí)。
例：Columbus proved that the earth is round..
4) 現(xiàn)在時(shí)刻的'狀態(tài)、能力、性格、個(gè)性。
I don't want so much.
Ann Wang writes good English but does not speak well.
【比較】
1. Now I put the sugar in the cup. 2. I am doing my homework now.
第一句用一般現(xiàn)在時(shí)，用于操作演示或指導(dǎo)說(shuō)明的示范性動(dòng)作，表示言行的瞬間動(dòng)作。再如：Now watch me, I switch on the current and stand back. 第二句中的now是進(jìn)行時(shí)的標(biāo)志，表示正在進(jìn)行的動(dòng)作的客觀狀況，所以后句用現(xiàn)在進(jìn)行時(shí)。
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