系动词Be（am, is， are)的用法
一、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.
二、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。
相关练习题
一、用am， is， are 填空
1. I ______ a boy。 ______ you a boy? No, I _____ not。
2. The girl______ Jack's sister。
3. The dog _______ tall and fat.
4. The man with big eyes _______ a teacher.
5. ______ your brother in the classroom？
6. Where _____ your mother? She ______ at home.
7. How _______ your father？
8。 Mike and Liu Tao ______ at school.
9。 Whose dress ______ this？
10. Whose socks ______ they?
11. That ______ my red skirt。
12。 Who ______ I ?
13.The jeans ______ on the desk.
14。Here ______ a scarf for you。
15。 Here ______ some sweaters for you.
16。 The two cups of milk _____ for me.
17. Some tea ______ in the glass.
18。 Gao shan's shirt _______ over there.
19。 My sister’s name ______ Nancy。
20. This ______ not Wang Fang's pencil。
21。 ______ David and Helen from England?
22. There ______ a girl in the room。
23。 There ______ some apples on the tree。
24。 _______ there any kites in the classroom?
25. _______ there any apple juice in the bottle？
26。 There _______ some bread on the plate.
27. There _______ a boy， two girls, three men and ten women in the park.
28. You, he and I ______ from China.
二、用be动词的适当形式填空
1。 I _______ at school just now（刚才）。
2. He ________ at the hotel last week。
3。 We ________ students two years ago.
4. They ________ on the farm a moment ago(刚才)。
5. Yang Ling ________ eleven years old last year.
6。 There ________ an apple on the plate yesterday.
7. There ________ some milk in the fridge on Sunday。
8。 The phone _______ on the sofa yesterday evening.
9. I ______ an English teacher now.
10。 She _______ happy yesterday。
11。 They _______ glad to see each other last month。
12. Helen and Nancy ________ good friends.
13. The little dog _____ two years old this year。
14. Look， there ________ lots of grapes here。
15。 Today _____ the second of June。 Yesterday ______ the first of June。 It _____ Children’s Day. All the students ______ very excite
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）。
初一英语am, is， are 专项练习
1。 I ______ a boy. ______ you a boy? No， I _____ not.
2. The girl______ Jack’s sister。
3. The dog _______ tall and fat。
4。 The man with big eyes _______ a teacher。
5. ______ your brother in the classroom？
6. Where _____ your mother？ She ______ at home。
7。 How _______ your father?
8. Mike and Liu Tao ______ at school.
9. Whose dress ______ this？
10. Whose socks ______ they?
11. That ______ my red skirt。
12。 Who ______ I?
13。The jeans ______ on the desk.
14.Here ______ a scarf for you.
15. Here ______ some sweaters for you.
16. The black gloves ______ for Su Yang.
17。 This pair of gloves ______ for Yang Ling.
18。 The two cups of milk _____ for me。
19。 Some tea ______ in the glass。
20. Gao shan’s shirt _______ over there。
21。 My sister's name ______Nancy.
22. This ______ not Wang Fang's pencil.
23. ______ David and Helen from England?
24. There ______ a girl in the room。
25。 There ______ some apples on the tree.
26。 _______ there any kites in the classroom?
27。 _______ there any apple juice in the bottle?
28. There _______ some bread on the plate.
29。 There _______ a boy, two girls, three men and ten women in the park.
30。 You， he and I ______ from China。
答案：
1 am Are am 2 is 3 is 4is 5 Is 6 is 7is 8are 9is 10are 11is 12am
13are 14is 15are 16are 17is 18are 19is 20is 21is 22is 23Are 24is
25are 26Are 27Is 28is 29is 30are
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