四年级上册英语素材-Unit1Myclassroom知识点汇总人教PEP版

四年级第一单元（Grade 4 Unit 1）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 我有一只小猫。 他有一台电脑。 他们有一些书。 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） 教室里有一块黑板。 教室里有六盏灯。 大街上有许多人。 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） 在土里 在房子里 在中国 在西安 On 在……上 在桌子上 在操场上 At 在……（较小的地方） 在家 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! ☆应用： What is in your bag? What is on the desk? Who are in the room? What are on the playground?