同學(xué)們學(xué)習(xí)一般現(xiàn)在時,最先學(xué)習(xí)和運(yùn)用的是be動詞。如果你能勇闖下面的三道關(guān),一定可以輕松掌握be動詞的用法??靵戆?
No.1 形式關(guān)
be動詞在一般現(xiàn)在時中有三種形式:am,is和are。它有人稱和數(shù)的變化。請看下表:
[金牌例句]①I am English.
②—AreyousllfromAmerica?
—Yes,we are.
③She is a new student.
No.2 縮寫關(guān)
be動詞的縮寫有兩種類型:
①否定縮寫。當(dāng)be與not在一起時,可以縮寫:aye not→aren’t,is not→isn't。如:
We are not(aren't)in Class Five.
This is not(isn't)a bag.
注意:am與not在一起時不能縮寫。
②主謂縮寫。be與作主語的名詞或代詞縮寫時的形式變化為:am→'m,are→'re,is→'s。如:
You are my classmates.=You're my classmates.
That is a book.=That's a book.
注意:(1)這種縮寫形式一般不位于句末。請看
[誤]—Is this a book?
—Yes,it's.
[正]—Is this a book?
—Yes,it is.
(2)is不能與this縮寫。如:
[誤)This's a playground.
[正]This is a playground.
No.3用法關(guān)
be動詞一般用作聯(lián)系動詞。
①有“是”的意思。如:
It is a bird.它是一只鳥。
②表示存在狀態(tài),意思是“有、在”。如:
1)—What's in your purse?你的錢包里有什么?
—There is some money in it.里面有一些錢。
2)—Where are her clothes?她的衣服在哪里?
—They are on the bed.它們在床上。
③表示人或事物現(xiàn)在的狀態(tài),本身無實(shí)在含義。如:
How old are you?你多大了?
The box is light.盒子很輕。
④用于一些習(xí)慣用語。如:
Here you are.給你。
You are welcome.不用謝。
That's all right.別客氣。
⑤表示時間、數(shù)量關(guān)系等。
如:—What time is it?幾點(diǎn)了?
—It's 8 o'clock.八點(diǎn)了。
What's 2 plus 5?二加五等于多少
跟蹤練習(xí)
用be動詞的適當(dāng)形式填空。
1.—What grade_____you in?
—I____in Grade 7.
2.—____she Mrs Green?
—No,she______.
3.—How old_____your sister?
—She_____eight years old.
4.—Where____Simon and Daniel?
—They____in the classroom.
5.This____a book and those_____pencils.
Key:1.a(chǎn)re,am 2.Is,isn't 3.is,is 4.a(chǎn)re,are 5.is,are
責(zé)任編輯/張彩萍mirenr@sina.com