初中英语考试语法专题:一般现在时精讲+精练+答案.docx
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1、一、 定义与讲解一般现在时:表示经常性,习惯性的动作或状态。时间状语:often 经常,usually通常,always 总是,every每个,sometimes 有时,seldom 极少,never从不结构:动词原形 (第三人称单数-动词+s/es)。第三人称单数变化:(1)直接在动词词尾加-s.ask-asks work-works get-gets stay-stays(2)以字母s, x, ch, sh或o结尾的动词,在词尾直接加-es.watch-watches wish-wishes fix-fixes do-doesgo-goes pass-passes(3)以“辅音字母加 -
2、y”结尾的动词,要先变y为i再加-es.try-tries study-studies cry-cries fly-flies2.不规则变化:be- is arehave-has二、一般现在时用法1. 表示经常性,习惯性,永久性的动作或存在的状态.通常与副词sometimes, often, usually, always, every day (year, month ), once (twice, three times) a day,等时间状语连用。Theyusuallygo to school by bike.他们通常骑自行车去上学。I take the medicinethree t
3、imes a day.我一天吃药三次She helps her motheronce a week.她每周帮她妈妈一次。Marys father is a policeman.玛丽的爸爸是个警察。There are 50 students in my class.我们班里有50名学生。2. 表示客观真理,科学原理,自然现象,等客观事实或格言,谚语等。The sun rises in the east and sets in the west every day.太阳每天从东边升起从西边落下。Tomorrow is Tuesday.明天是星期二。三、一般现在时的句子转换:(1)当句子中有be动词
4、或情态动词时,则把be动词或情态动词(can,could等等)提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.例:陈述句:She is a student.疑问句 Is she a student?否定句 She is not a student.陈述句:I can swim.疑问句 Can you swim否定句 I can not swim.(2) 当句子中即没有be动词,也没有情态动词时,则在主语前加助动词do (you,以及复数), does(单数she,he,it)变成问句;在主语后谓语动词前加助动词dont(I,you,以及复数), doesnt(单数she,
5、he,it)变成否定句,助动词后的动词要变成动词原形。陈述句:We get up at 7:00 every morning.我们每天早上7点起床。疑问句Do you get up at 7:00 every morning?否定句We dont get up at 7:00 every morning.陈述句:Shehasa little brother.她有一个小弟弟。疑问句Doesshe have a little brother?否定句 Shedoesnthave a little brother.一 用所给词的正确形式填空,并且把关键词圈出来。1. We often_(play) o
6、n the playground.2. He _(get) up at six oclock.3. _you _(brush) your teeth every morning.4. What_ (do) he usually _(do) after school?5. Danny _(study) English, Chinese, Maths, Science and Art at school.6. Mike sometimes _(go) to the park with his sister.7. At eight at night, she _(watch) TV with his
7、 parents.8. _ Mike_(read) English every day?9. How many lessons _your classmate_(have) on Monday?10. What time _his mother_(do) the housework?11. He often _(have) dinner at home.12. Daniel and Tommy_ (be) in Class One.13. We_ (not watch) TV on Monday.14. Nick _(not go) to the zoo on Sunday.15. They_
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