系动词be(am, is, are)的用法。
一、am, is, are的用法。
1. is和are可分别与not缩写为isn’t和aren’t，但am却不能与not缩写为amn’t ，虽然有人把它缩为ain’t，但这毕竟是规范的口语说法，不宜仿用。
2. 陈述部分为第一称肯定式时的反意疑问句，通常用aren’t如：
i’m late, aren’t i?我迟到了，是吗？
3. 不要认为在主语之后总是用am。试看：
both he and i are right. 他和我都对。或他和我都不对。
neither he nor i am (或are) right. 他和我都不对。
i" is an english letter. i是英语字母。
4. 当am, is are 位于句末时，均不能与主语缩写。如：
tell me where he is (不能用he’s )。告诉我他在哪儿。
he is taller than i am (不能用i’m )。他比我高。
a：are they watching tv? 他们在看电视吗？
b：yes, they are. (不能用they’re)是的。
注：若其后有not时，am, is, are则可以与主语缩写，其中is和are 也可与not 缩写。如：
are they watching tv? -no, they’re not (或they aren’t).
二、请记住以下口诀：
我用am，你用are，is连着他，她，它；
单数名词用is，复数名词全用are。
变疑问，往前提，句末问号莫丢弃。
变否定，更容易，be后not莫忘记。
疑问否定任你变，句首大写莫迟疑。
be动词在一般过去时中的变化：
1．am 和is在一般过去时中变为was。（was not = wasn’t）
2．are在一般过去时中变为were。（were not = weren’t）
3．带有was或were的句子，其否定、疑问的变化和am,is, are一样，即否定句在was或were后加not，一般疑问句把was或were调到句首。
一、用am, is, are 填空。
1. i __a boy.__you a boy? no, i __not.
2. the girl___is___jack's sister.
3. the dog __is___tall and fat.
4. the man with big eyes __is___a teacher.
5. _is___your brother in the classroom?
6. where __is__ your mother? she __is___at home.
7. how___is___your father?
8. mike and liu tao _are__ at school.
9. whose dress __is__ this?
10. whose socks __are___they?
11. that __is___my red skirt.
12. who __am___i ?
jeans __are___on the desk.
is___a scarf for you.
15. here __are___some sweaters for you.
16. the two cups of milk __are___for me.
17. some tea __are___in the glass.
18. gao shan's shirt __is___over there.
19. my sister's name __is_ nancy.
20. this __is___not wang fang's pencil.
21.__are __d**id and helen from england?
22. there __is___a girl in the room.
23. there __are___some apples on the tree.
24. _are __there any kites in the classroom?
25. _is __there any apple juice in the bottle?
26. there __are___some bread on the plate.
27. there __are__ a boy, two girls, three men and ten women in the park.(or)am
28. you, he and i __are___from china.
二、用be动词的适当形式填空。
1. i __was___at school just now（刚才）.
2. he __was___at the hotel last week.
3. we __were___students two years ago.
4. they __were___on the farm a moment ago(刚才).
5. yang ling __was___eleven years old last year.
6. there __was___an apple on the plate yesterday.
7. there __were___some milk in the fridge on sunday.
8. the phone __was___on the sofa yesterday evening.
9. i __was___an english teacher now.
10. she __was___happy yesterday.
11. they __were___glad to see each other last month.
12. helen and nancy __were___good friends.
13. the little dog __was___two years old this year.
14. look, there __were___lots of grapes here.
15. today __is___the second of june. yesterday __was___the first of june.
it __was___children’s day. all the students __were___very excite
仿照例句改写下列句子。
例句：she is in class nine, grade seven.
否定句： she is not in class nine, grade seven.
一般疑问句： is she in class nine, grade seven.?
回答：yes, she is. (no, she isn’t)
1. that is his key..
否定句。一般疑问句。
回答：h**e classes from monday to friday.
否定句。一般疑问句。
回答：3. we can finish the work in an hour..
否定句。一般疑问句。
回答：4. this is my mother.
否定句。一般疑问句。
回答：and mike go swimming every afternoon.
否定句。一般疑问句。
回答：am a student...
否定句。一般疑问句。
回答：7. his telephone number is 6629722.
否定句。一般疑问句。
回答：句型转换。
can see some cars.(一般疑问句)
can see the tea. (改否定句)
like milk in my coffee. (改否定句)
want some eggs. (改一般疑问句。
reads magazines every day. (改一般疑问句)
white likes vegetbles. (改一般疑问句)
rains sometimes in autumn. (改一般疑问句)
sun shines every day in summer. (改否定句)
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