七年级上册不定冠词a和an即定冠词the

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不定冠词a和an,定冠词the的基本用法
(1)不定冠词a和an
表示一(个、支、本、块……)的意思,是泛指。

不强调数量概念,而是强调
类别,用来限定名词。

A用在以辅音音素开头的单数名词前,如:a pencil, a book;
an用在以元音音素开头的单数名词前,如:an eraser, an orange bag;
如果名词前有修饰语,用a还是an则以该修饰语的第一音素决定。

如:a big apple;
an English book
(2)定冠词the
表示某个或某些特定的人或事物,也指对话双方明白的人或事物,或上文提到
的人或事物,the可以用来修饰可数名词和不可数名词,包含有this, that, these,
those的意思。

如:
Where’s the clock?The books are on the desk.
Who is the man under the tree?I have a bike. The bike is new.
Exercise:在下列句中空白处填入适当冠词.
1.What’s this? It’s ______ clock.
2.What’s that? It’s_____alarm clock.
3.There is ___ “f”and ____ “s”.
4.Jim’s mother is______ teacher.
5.Those pens are in _______ pencil-box.
6.Here’s ________ interesting family photo.
7.When does Lily go to bed in ______evening?
8._____ “h”,____ “o”and ____“w” in the word “how”.
9.Where is ________bag? It’s under_______table.
10. What color is your coat? It’s ___orange. It’s ___orange coat.
11.Do you have_______pingpong ball? Yes, I do.
12. I have ____ car. ____car is red.
13. I play basketball for _____hour.。