be动词与助动词（讲义）沪教牛津版（深圳用）英语四年级上册

be 动词和助动词精讲精练 一． be动词的变化。（am / is / are） 　① 肯定句：主语+be+其它。 如：I am a boy.我是一个男孩。 ② 否定句：主语+ be + not +其它。如：He is not a worker.他不是工人。 　③ 一般疑问句：Be +主语+其它。如：---Are you a student? ---Yes. I am. / No, I’m not. 　④ 特殊疑问句：疑问词+一般疑问句。如：Where is my bike? 二． 行为动词的变化。 ① 肯定句：主语+ 动词原形+其它。如：I like bread. 　② 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. 　③ 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. 　④ 特殊疑问句：疑问词+一般疑问句。如：How does your father go to work? Practice 1， 用be动词的适当形式填空。 1. My classmates_______(be) in the playground now. 2. There____(be) a pen and two books on the desk. 3. Tom and I ______(be) good friends. 4. Lucy with Tim ______（be）in the classroom. 5. There_____(be) two apples and an orange on the table. 6. One of my friends ______(be) Japanese. 7. My birthday _____(be) in December. 8. --What ______ (be)your mother like?--She____(be) tall. 9. Her clothes_____(be) on the bed. 10. Here ______(be) a book and two erasers for you. 11. My parent_____(be) a taxi driver. 12. This pair of socks _____(be) nice. 13. There ______(be) some water in the bottle. 14. The three cups of milk______(be) for her. 15. Let’s______(be) friends. 16. These _____（be）apple trees. 17. Three and five _____(be) eight. 18. Maths ______(be) very interesting. 19. ---Where_____(be) Lucy and Lily ?---They _____(be) at home. 20. I want to _____(be) a teacher in the future. 2. 选择题,在正确的答案后面打钩。 1. _____(Does/Is) Tom look happy? 2. _____(Does/Is) your friend happy today? 3. _____(Does/Is) your cousin come from Beijing? 4. My uncle ______(does/is) from Shanghai. 5. The girl ______(isn’t/doesn’t) do her homework every day. 6. ______(Is/Does) your sister a member of the Reading Club? 7. Lucy’s hair _____(is/are) black and long. 8. One of my hobbies_____(is/are) swimming. 9. The man in black ______(doesn’