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 擦洗窗户擦洗窗户clean the classroom 打扫教室打扫教室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 的用法的用法in 在……里，在……（较大的地方）在土里__________________ 在房子里_______________ 在中国________________ ☆应用：在西安______________ What is in your bag?________________ On 在……上What is on the desk?________________ 在桌子上______________ Who are in the room? _______________ 在操场上______________ What are on the playground? __________ 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! 第二单元（Unit 2 My Schoolbag）语言知识点总汇重点单词（须识记）schoolbag n. 注意：记单词时要着pencil-case n. 重记忆单词的读音拼写，book n. notebook n. 词性和中文意思！color/ colour n. have v. many adj. Chinese n. adj. English n. adj. math n. story-book n. put v. under prep. eraser n. near prep. new adj. 练习：这支钢笔是什么颜色？nice adj. panda n. What color What color is color is it? is it? 这些尺子是什fat adj. 么颜色？ruler n. pencil n. 2.What color is it?