【导语】在知识海洋的底层，与生活海洋的底层一样，是一片无比神奇的世界。愿你勇敢地潜到那儿去，去探求这神秘世界的无穷奥秘！以下是为大家整理的《三年级上册英语语法讲解【三篇】》供您查阅。
【篇一】
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。
【注意】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, I"m 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。
否定句：主语+ don"t( doesn"t ) +动词原形(+其它)。如：I don"t like bread.
当主语为第三人称单数时，要用doesn"t构成否定句。如：He doesn"t 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 don"t.
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 doesn"t.
特殊疑问句：疑问词+一般疑问句。如：How does your father go to work?
3.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’m staying in bed.
16. She _______(go) to school from Monday to Friday.
17. Liu Tao _______(do) not like PE.
18. The child often _______(watch) TV in the evening.
19. Su Hai and Su Yang _______(have) eight lessons this term.
20. －What day _______(be) it today?
－ It’s Saturday.
三、按照要求改写句子
1. Daniel watches TV every evening.(改为否定句)
___________________________________________________
2. I do my homework every day.(改为一般疑问句，作否定回答)
___________________________________________________
3. She likes milk.(改为一般疑问句，作肯定回答)
___________________________________________________
4. Amy likes playing computer games.(改为一般疑问句，作否定回答)
___________________________________________________
5. We go to school every morning.(改为否定句)
___________________________________________________
6. He speaks English very well.(改为否定句)
___________________________________________________
7. I like taking photos in the park.(对划线部分提问)
___________________________________________________
8. John comes from Canada.(对划线部分提问)
___________________________________________________
9. She is always a good student.(改为一般疑问句，作否定回答)
___________________________________________________
10. Simon and Daniel like going skating.(改为否定句)
___________________________________________________
五、改错(划出错误的地方，将正确的写在横线上)
1. Is your brother speak English?
___________________________________________________
2. Does he likes going fishing?
___________________________________________________
3. He likes play games after class.
___________________________________________________
4. Mr. Wu teachs us English.
___________________________________________________
5. She don’t do her homework on Sundays.
___________________________________________________
【篇二】
现在进行时
1．现在进行时表示现在正在进行或发生的动作，也可表示当前一段时间内的活动或现阶段正在进行的动作。
2．现在进行时的肯定句基本结构为be+动词ing.
3．现在进行时的否定句在be后加not。
4．现在进行时的一般疑问句把be动词调到句首。
5．现在进行时的特殊疑问的基本结构为：疑问词 + be + 主语 + 动词ing?
但疑问词当主语时其结构为：疑问词 + be + 动词ing?
动词加ing的变化规则
1．一般情况下，直接加ing
如：cook-cooking
2．以不发音的e结尾，去e加ing
如：make-making, taste-tasting
3．如果末尾是一个元音字母和一个辅音字母，双写末尾的辅音字母，再加ing
如：run-running, stop-stopping
现在进行时专项练习：
一、写出下列动词的现在分词：
play________ run________ swim________ make________
go________ like________ write________ ski________
read________ have________ sing________ dance________
put________ see________ buy________ love________
live________ take________ come________ get________
stop________ sit________ begin________ shop________
二、用所给的动词的正确形式填空：
1.The boy ________ (draw) a picture now.
2. Listen .Some girls ________ (sing) in the classroom .
3. My mother ________ (cook) some nice food now.
4. What ________ you ________ (do) now?
5. Look. They ________ (have) an English lesson.
6.They ________ (not water) the flowers now.
7.Look! the girls ________ (dance) in the classroom.
8.What is our granddaughter doing? She ________ (listen) to music.
9. It’s 5 o’clock now. We ________ (have) supper now.
10. -________ Helen ________ (wash) clothes? -Yes, she is.
三、句型转换：
1. They are doing housework.(分别改成一般疑问句和否定句)
_________________________________________________________
_________________________________________________________
2．The students are cleaning the classroom. ( 改一般疑问句并作肯定和否定回答)
_________________________________________________________
_________________________________________________________
3．I’m playing the football in the playground.(对划线部分进行提问)
_________________________________________________________
4．Tom is reading books in his study . (对划线部分进行提问)
_________________________________________________________
【篇三】
名词复数规则
1．一般情况下，直接加-s
如：book-books, bag-bags, cat-cats, bed-beds
2．以s. x. sh. ch结尾，加-es
如：bus-buses, box-boxes, brush-brushes, watch-watches
3．以“辅音字母+y”结尾，变y为i, 再加-es
如：family-families, strawberry-strawberries
4．以“f或fe”结尾，变f或fe为v, 再加-es
如：knife-knives, wife-wives
5．不规则名词复数：
man-men, woman-women, policeman-policemen, policewoman-policewomen,
mouse-mice, child-children, foot-feet, tooth-teeth, fish-fish, people-people
Chinese-Chinese, Japanese-Japanese
写出下列各词的复数
watch _______ child _______ photo _______ diary _______
day _______ foot_______ book_______ dress _______
tooth _______ sheep _______ box _______ strawberry _______
thief _______ yo-yo _______ peach _______ sandwich _______
man _______ woman _______ Chinese _______ bag _______
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