六上U7知識點

1、Unit Seven【語法】情態(tài)動詞初了解情態(tài)動詞本身有一定的詞義，但不能單獨使用，必須與后面的動詞原形（行為動詞、系動詞）構成句子的謂語，情態(tài)動詞無人稱和數(shù)的變化。常見的情態(tài)動詞有： can (could ), may ,must ,have to ,shall(should), will(would)等。 現(xiàn)在一起來了解下含情態(tài)動詞的各種句式：（1）肯定句結構： 主語+情態(tài)動詞+動詞原形+其他如： You should read books now.你現(xiàn)在應該看書了。（2）否定句結構：主語+情態(tài)動詞+not+動詞原形+其他如：We shouldnt waste energy.我們不應該浪費

2、能源。（3）一般疑問句結構： 情態(tài)動詞+主語+動詞原形+其他？如：Shall we go to the library now? 我們現(xiàn)在去圖書館好嗎？ Good idea. 好注意。（4）特殊疑問句機構：特殊疑問詞+情態(tài)動詞+主語+動詞原形+其他？如： What should we do now? 我們現(xiàn)在應該做什么？ We should wait for our parents. 我們應當?shù)任覀兊母改??！菊Z言知識點】1. We use water to clean things. 我們使用水洗東西 use sth to do sth使用某物做某事eg. We use wood to mak

3、e chairs.我們用木頭做椅子。同樣，我們也可以說：reuse sth to do sth. 再利用某物做某事。例如：I can reuse paper to make a box. 我能再利用紙來做一只盒子。I can reuse a plastic bottle to make a toy. 我能再利用一只塑料瓶做一玩具。2. We should save water. 我們應該節(jié)約水。 We shouldnt waste water.我們不應浪費水。情態(tài)動詞should表示“應該”，shouldnt表示“不應該”。其后要跟動詞原形。例如：We shouldnt play footba

4、ll in the street. 我們不應該在街上踢足球。You should get up early. 你應該早點起床。3. Most of our energy comes from coal and oil.我們大多數(shù)能源來自煤炭和石油。 come from 的意思是“來自”，它相當于be from。例如：Jack comes from the US.= Jack is from the US.杰克來自美國Where are you from? = Where do you come from? 你從哪兒來？4. We should not drive so much because

5、 cars use a lot of energy. We should not cut down too many trees because trees help keep the air clean.We should not use too many plastic bags or bottles. Too much plastic is bad for the Earth. In many places, there is not much water. There is not much coal or oil on Earth.We use wood to make tables

6、, chairs and many other things.many和much的區(qū)別：從以上句子可以看出：many后跟可數(shù)名詞復數(shù)，much 后跟不可數(shù)名詞，例如：He has many friends here. 他在這兒有許多朋友。He has much work to do. 他有許多工作要做。與many 和much相關的短語有：so many/ so much 這么多， too many/ too much 太多How many/ How much? 多少？例如：He eats so much every day. 他每天吃這么多。Dont eat too much for supp

7、er. Its bad for your health. 晚飯別吃太多，對你的身體不好。How much milk is there in the fridge? 冰箱里還有多少牛奶？I dont want so many boxes. 我不需要這么多箱子。There are too many cars on the road. 馬路上有太多的車子。How many birds can you see in the tree? 你能看到樹上有多少只鳥？35. Too much plastic is bad for the Earth. 太多的塑料對地球有害。be bad for對有害，對不好，

8、相反的就是be good for.對有好處，例如： Watching too much TV is bad for your eyes. 電視看得太多對眼睛不好。 Eating fruit is good for your health. 吃水果對身體有好處。6. Lets make a poster and tell them about it.讓我們做張海報告訴他們關于它。tell sb about sth的意思是：告訴某人有關某事，例如：The teacher is telling the students about the Earth. 老師正在告訴學生有關地球的知識。Did you tell him about the party? 你把聚會的事情告訴他了嗎？7. Let me draw some bananas on the trees. 讓我在樹上畫一些香蕉。on the tree 在樹上。強調是長在樹上。如果要表示外來物在樹上則用in the tree。例如：Look, there is a kite in the tree. 看，樹上有一只風箏。Can you pick the oranges on the tree? 你能摘到樹上的橘子嗎？8. 知識了解讓學生知道每年的4月22日為“世界地球日”；每年的6月5日為世