四种时态练习及标准答案

一般现在时基本知识

一:一般现在时:表示经常性的事情。时间状语:often经常, usually通常, always总是, every每个, sometimes有时, at…在几点钟只有第三人称单数用动词三单,其余动词均用原形三单变化:多数在动词后加s play—plays like—likes以s,x,sh,ch,o结尾的动词加es go—goes wash--washes 以辅音字母加y

结尾,把y改i再加es fly—flies

二:基本结构:动词原形(如主语为第三人称单数,动词上要改为第

三人称单数形式)

三:否定形式:am/is/are+not;此时态的谓语动词若为行为

动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词。

四:一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词。

五:但是,动词to be 和to have 的一般现在时的形式特殊如下:

一般动词的词形变化 To be的词形变化To have 的词形变化

I knowit I am a student I havea pen.

You know it.You are a student You havea pen

He (she) knows it. He (she)is a student.He (she)has a pen.

We (you,they)know it.We(you,they) are students. We (you,they) have pens.

六:习题及部分答案

一、写出下列动词的第三人称单数

talk______forget______hope______stop______perfo rm______p lay______say______

buy______worry______fly______study_______like_______make______ take______

love_______recite_______become_______come_______drive_______shine_______

leave_____wake_______ride_______write___

____hike______give______ see______swim______stop______shop_______plan______get_______sit__

_____let_______

cut_______run_______forget_______be

gin_______wash_____watch_______

finish______teach_____fish_______reach_______go_______do_____

二、用括号内动词的适当形式填空。

1. Heoften ________(have) dinner at home. (答案:has)

2. Daniel andTommy _______(be) inClassOn e. (答案:are)

3. We _______(not watch) TV on Monda

y. (答案:doesn’t watch)

4. Nick_______(notgo) to the zoo on Sunday. (答案:doesn’t go)

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