手机短信验证
不定冠词的基本用法
1. 表类别：即指人或事物的类别。
A teacher is a person who teaches.
2. 表数量：即表示数量“一”。
I’ll be able to finish it in a day or two.
3. 表同一性：即表示“同一”，说明事物的同一性质、特征、大小或程度等。
This hat and that one are of a shape.
4. 表程度：用于most前表示“非常”“十分”。
It’s a most boring book.
语法易错题
英语单词快速记忆
高中英语课本
不定冠词的考点性用法
1. 用于序数词前：表示“再一”、“又一”。
She thanked him a second time.
Shall I ask her a third time?
2. 用于由动词转化来的名词前：表示一次、一番等义(通常与 have, take, make, give 等动词连用)。
We’ve already had a try at it.
I went down to the beach and took a swim.
3. 用于专有名词前：相当于a certain，意为“一个”“某个”。
The house next door has been bought by a Mr Jones.
4. 用于抽象名词前：使之具体化，表示与该之相关的具体的人或事
He was a success in business.
It’s a pleasure to talk with you.
单句改错
1. I still remember how hard first day was.
2. They live far from the school, and it takes them about a hour and a half to go to work every day.
3. At the first, I thought I knew everything and could make decisions by myself.
4. I asked Mom to stay in the sitting room and I cooked in kitchen.
5． He liked it so much that he quickly walked into the shop ...he turned around and found his parents were missing. Tony was scared and began to cry. A woman saw him crying and told him to wait outside a shop.
6. Now I am living in a city, but I miss my home in countryside. There the air is clean and the mountains are green.
7. On the right side of the class was the road. I was always interested to see the drivers in hurry in the morning.
8. There are all kinds of the flowers and trees around the classroom buildings.
9. As result, the plants are growing everywhere.
10. Besides,Cleo tends to bark a average of six hours a day.
1.解析：first前加the/my 表示“第几天”，序数词前要加定冠词the或者用限定词进行修饰。
2.解析：第一个a→an/one hour的读音以元音音素开头，且是可数名词，所以表示一个小时用an/one hour。
3.解析：去掉the at first “起初”，为固定短语。
4.解析：kitchen前加the 此处特指我们家的厨房。
5.解析：outside后的a→the 此处用定冠词特指上文提到的商店。
6. 解析：countryside前加the in the countryside“在乡村”，为固定短语。
7.解析：hurry前加a in a hurry“匆匆忙忙”，为固定短语。
8.解析：去掉第一个the 此处为泛指，不表示特指，故去掉the。
9.解析：As后加a as a result“结果”，为固定搭配。
10.解析：第一个a→an an average of ...“平均有……”，为固定搭配。
