一、基本含义
There be 句型表示“某地/某时存在有……”，它强调的是“存在”，而不是“拥有”（拥有用 have/has ）。
二、核心时态与例句
There are + 复数名词
- 例句：
- There is a book on the desk.
- There is some water in the bottle.
- There are three cats under the tree.
2. 一般过去时
- 结构： There was + 单数/不可数名词
There were + 复数名词
- 例句：
- There was a park here 10 years ago.
- There was no milk in the fridge yesterday.
- There were many birds in the forest last summer.
3. 一般将来时
- 结构： There will be + 名词 / There is/are going to be + 名词
- 例句：
- There will be a sports meeting next week.
- There is going to be a new film this weekend.
- There are going to be 50 students in our class.
三、主谓一致规则
1. 就近原则：be动词的形式由离它最近的名词决定
- There is a pen and two books on the table.
- There are two books and a pen on the table.
2. 不可数名词：永远用 is/was
- There is some bread in the box.
- There was a lot of rain last month.
3. 复数名词：永远用 are/were
- There are 45 students in our class.
- There were many trees here before.
四、疑问句与否定句
疑问句
- 一般现在时： Is there...? / Are there...?
- Is there a library in your school?
- Are there any apples in the basket?
- 一般过去时： Was there...? / Were there...?
- Was there a party last night?
- Were there any cars on the road?
否定句
- 一般现在时： There isn't... / There aren't...
- There isn't a map on the wall.
- There aren't any eggs in the fridge.
- 一般过去时： There wasn't... / There weren't...
- There wasn't a hospital here in 1990.
- There weren't any computers in the classroom.
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