四年上重点语法.docVIP

、一般现在时一般现在时基本用法介绍 【No. 1】一般现在时的功能　　1.表示事物或人物的特征、状态。如：The sky is blue.天空是蓝色的。　　2.表示经常性或习惯性的动作。如：I get up at six every day.我每天六点起床。　　3.表示客观现实。如：The earth goes around the sun.地球绕着太阳转。　　一般现在时的构成1. be动词：主语+be(am,is,are)+其它。如：I am a boy.我是一个男孩。2.行为动词：主语+行为动词(+其它)。如：　　We study English.我们学习英语。当主语为第三人称单数(he, she,it)时，要在动词后加-s或-es。如：Mary likes Chinese.玛丽喜欢汉语。 一般现在时的变化 1. be动词的变化。否定句：主语+ be + not +其它。　　如：He is not a worker.他不是工人。一般疑问句：Be +主语+其它。如：-Are you a student?-Yes. I am. / No, Im not. 特殊疑问句：疑问词+一般疑问句。如：Where is my bike?2.行为动词的变化。2、行为动词的变化 否定句：主语+ dont( doesnt ) +动词原形(+其它)。如：I dont like bread.当主语为第三人称单数时，要用doesnt构成否定句。如：He doesnt often play.一般疑问句：Do( Does ) +主语+动词原形+其它。如：- Do you often play football?　- Yes, I do. / No, I dont.当主语为第三人称单数时，要用does构成一般疑问句。如：- Does she go to work by bike?　- Yes, she does. / No, she doesnt.特殊疑问句：疑问词+一般疑问句。如：How does your father go to work 动词+s的变化规则 1．一般情况下，直接加-s，如：cook-cooks, milk-milks 2．以s. x. sh. ch. o结尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes 3．以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies 一般现在时用法专练:一、 写出下列动词的第三人称单数 drink ________ go _______ stay ________ make ________look _________ have_______ pass_______???? carry ____come________????? watch______ plant_______ fly ________study_______ brush________ do_________???? teach_______二、用括号内动词的适当形式填空。1. He 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. ______ they ________(like) the World Cup?6. What _______they often _______(do) on Saturdays?7. _______ your parents _______(read) newspapers every day?8. The girl _______(teach) us English on Sundays.9. She and I ________(take) a walk together every evening.10. There ________(be) some water in the bottle.11. Mike _______(like) cooking.12. They _______(have) the same hobby.13. My aunt _______(look) after her baby carefully.14. You always _______(do) your homework well.15. I _______(be) ill. I抦 staying in bed.