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1、b初中八种英语时态精讲精练一 般 现 在 时一、用法1．表示经常发生的动作、行为或存在的状态。 常用的时间状语有：often, usually, always, every day/week/month/year, sometimes, seldom，once a week, twice a week, on Sundays等。 I go to school every day. 2．表示主语的身份或特征。His father is a doctor. Tom is tall. 3．表示一种客观事实或普遍真理。Th
2、e earth is round. The sun is bigger than the moon. 4．在条件状态从句和时间状语从句中，用一般现在时表示将来。If you don’t go soon, you’ll be late. 如果你不快去的话，你就要迟到了。二、构成动词一般现在时，除主语为单数第三人称以外，谓语动词一律用原形，若主语为第三人称单数，则谓语动词的词尾应发生变化（加-s或-es）。 1．在动词原形后加-s run→ runs 2．以ch, sh, s, o, x结尾的动词后加-esguess
3、es, fixes, teaches, washes, goes 3．以辅音字母+y结尾的动词，先将y变为i，再加-es try→ tries4．以元音字母+y结尾的动词后加-s stay→ stays 5.不规则形式：have-has 三、一般现在时的句型变化。1. 肯定句 （1）主语+ am / is / are +表语They are new students. I am tall. He is from Japan. bbam is are 用法口诀：I用am，you 用are，is 连着他、她
4、、它；单数用is , 复数一律都用are。 （2）a. 主语+实义动词+其它 I read English every morning. b. 单三人称主语+实义动词单三人称+其它He usually goes to school by bike.2.否定句 （1）主语 +am / is / are + not +表语 She is not a nurse. （2）a. 主语 +don’t +动词原形 +其它如：I don’t play soccer after school. b.单三人称主语+doesn’t
5、+动词原形+其它 Hedoesn’t go to the park after school. 3.一般疑问句： （1）Am / Is / Are +主语 +表语？ Is your mother a teacher?（2）a. Do + 主语 +动词原形 +其它 ？ Do you speak English? b. Does +单三人称主语+动词原形+其它？Does your brother have a wide mouth? 4.特殊疑问句： 特殊疑问词 +一般疑问句？What time does your
6、mother get up every day? 专项练习题 一、写出下列动词的第三人称单数形式1.study ________ 2. play________3.watch _____ 4.wash _______5.have _______ 6.ride _______7.take _______8.worry_______9.help_______10.say________ 11.put________12.teach________13.fly________14.eat ________15.go ___
7、____ 16.guess______17.read_______ 18.do _______19.call ________20.cry ________ 1-5 studies, plays, watches, washes, has 6-10. rides, takes, worries, helps, says 11-15 puts, bbteaches, flies, eats, goes 16-20 guesses, reads, does, calls, cries 二、用所给动词的适当形式填空1. H
8、e often ______(have) dinner at home. 2. Daniel and Tommy _____(be) in Class One. 3. We _______(not watch) TV on Monday. 4. Nick ______(not go) to the zoo on Sunday. 5. _____
