四年级第一单元知识点汇总
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
四年级第一单元知识点汇总
1. Let sb. do sth. 让某人做某事例如：Let me help you. Let us go! ( let us= let’s )
2. clean v. 打扫，清洁
例如：clean the window 擦洗窗户 clean the classroom 打扫教室 clean the board(= blackboard) 擦黑板 clean the fish bowl 擦洗鱼缸 clean the desk 擦桌子adj. 干净的，清洁的 (→dirty adj. 脏的，脏乱的) 例如： Our classroom is very clean.
3. Where is/ are sth. ? 某物在哪里？例如：Where is my book? Where is his pen?
Where are her friends? Where are their chairs?
4. open the door turn on the light sweep the floor clean the window put up the picture clean the board
5. 表示拥有 have 和there be句型的用法通常，表示某人拥有某物时，用have
表示某处有某物，客观地陈述某物位于某地，可以用There be句型（be 在这里有is 和are 两种形式）
6. have a look 看一看
look at sth. 看……（强调“看”的动作） see（强调看到的具体内容）例如：May I have a look? Look at that car!
Please look at the teacher. I see a cute dog.
7. 表示位置时介词in on at的用法 in 在……里，在……（较大的地方）On 在……上
At 在……（较小的地方）
8. Excuse me! After you!
9. this that these those的用法
this adj. (后可接单数名词) This dog is cute.
n. This is my desk.
that adj. (后可接单数名词) That woman is my mother.
n. That is my cup.
these adj. (后可接复数名词) These books are very interesting.
n. These are our books.
Those adj. (后可接复数名词) Those trees are green. n. Those pictures are nice!