新牛津深圳版英语七年级下册第4单元知识要点

新牛津深圳版英语七年级下册第4单元知识要点 一、单词： 1. disease 疾病( illness ) 2. convenient 方便的(= easier; convenience n. ) 3. branch 树枝( branches pl. ) 4. discuss 讨论(= talk about; discussion n.) 5. against 反对( again ) 6. container 7. example 例子( exam; simple ) 8. harmful 有害的( harm n.; harmless ) 9. oxygen 氧气 10. produce 生产(= make; product; production ) 11. gas 气体 12. pine 松树( fine; line; mine; nine; wine ) 13. hole 洞;孔( whole 整个的 ) 14. furniture 家具( 不可数名词; future ) 15. save 拯救( safe adj. ) 16. imagine 想象( imagination n. imagine doing ) 17. dig 挖( dug; digging ） 18. major 主要的(= big and important = main ) 19. carry 搬运；携带(marry结婚) 20. root 根( foot; boot; room; roof ) 21. fight 与…作斗争( fighter n. fought; eight; light; might; night; right; sight )

二、词组： 1. take in=absorb 吸收 2. know/ learn about 了解；学到 3. for example 例如 4. in fact=as a matter of fact 确切的说；实际上 5. look around 环顾四周 6. millions of 大量的，数以百万计的 7. be made of 由…制成 8. in our daily lives 在我们日常生活中 9. come/ be from 来自 10. air pollution 空气污染 11. write…down 写下；记下 12. with the help of … 在…的帮助下 13. cut down 砍倒 14. be good for 对有利/好处 15. as a result 结果是 16. living things 生物；有生命事物 17. fight against 与…作斗争 18. be good at = do well in 擅长于；在某方面好 19. be in danger 处于危险中 20. a lot of = lots of = many / much 许多 21. discuss = talk about = talk…over 讨论；商讨 22. be bad for = be harmful to = do harm to 对…有害 23. have fun = have a good time = enjoy oneself 过得愉快；玩得开心 24. provide sb with sth = provide sth for sb = offer sth to sb 给某人提供某物

三、句型结构： 1. stop doing sth 停止做某事 2. stop to do sth 停下来去做另件事 3. imagine doing sth 想象做某事 4. imagine sb to do sth 想象某人做某事 5. help sb do sth 帮助某人做某事 6. plan to do sth 计划打算做某事 7. want to do sth = would like to do sth = feel like doing sth 想要做某事 8. want sb to do sth = would like sb to do sth 想要某人做某事 9. keep / make … adj. 使… keep clean make the room beautiful 辨析： 1. carry 搬运；携带（无方向性）; take 拿走；带走; bring 拿来；带来; fecth 去拿来 = go and bring 2. be made of 由...制成; be made from 由...制成; be made up of 由...组/构成 The table is made of wood. 桌子是用木头制成的。(看得见原材料。) The wine is made from grapes. 酒是用葡萄酿造的。 (看不见原材料。) China is made up of over thirty provices. 中国是由三十多个省组成的。 四、语法：现在进行时态 1. 定义：现在进行时表示现在正在发生的动作或存在的状态。也可表示现阶段在进行的动作。 2. 标志(时间): now= at the moment 提示词: Look Listen It's 8:00 now. 对这些时间状语提问时用疑问词 when 例: Look! They are playing football. Listen! The girl is singing in the room. It’s 12:00 now. is having lunch 3、现在进行时态构成： 主语+ be动词现在式（am、is、are）+动词ing 4、现在进行时的几种句型： （一）陈述句（肯定句、否定句） 肯定句：主语 ＋ be(am, is, are) + 现在分词 Jim is singing. 否定句：主语 ＋ be(am, is, are) + not + 现在分词 He isn’t reading English. （二）一般疑问句；（变疑问句将be动词移到句首主语前） Be(Am, Is, Are) + 主语 ＋ 现在分词 Is Tom working Yes, he is. No, he isn’t. （三）特殊疑问句 疑问词 ＋ be (am, is, are) ＋ 主语 ＋ 现在分词 例: They are playing football on the playground now. 否定句: They aren't playing football on the playground now. 一般问句: Are they playing football on the playground now 特殊问句: What are they doing on the playground now 肯定式 否定式

单数 I am working. You are working. He/ She is working. I am not working. You are not working. He/ She is not working. 复数 We/ You/ They are working. We/ You/ They are not working. 附:动词的现在分词的构成规则 1、一般情况下，直接加ing，如：cook→cooking、read→reading、look→looking 2、以不发音的e结尾，去e加ing，如：make→making, have→having、write→writing 3、以一个元音字母 + 一个辅音字母结尾的重读闭音节动词,双写该辅音字母,再加- ing: run→running, stop→stopping、swim→swimming、sit→sitting、begin→beginning 4、以y或w结尾的动词,直接加-ing: play→playing fly→flying throw→throwing 5、但 die (死) →dying lie(躺;说谎) →lying tie(系;捆) →tying fix→fixing

五、写作指导 作文范文： （一） Save the trees Trees are our best friends on Earth. They produce oxygen for us to breathe, and they take in waste gas from cars and other harmful gases from the air. Trees also make our lives more comfortable and convenient. Look around and you will find that a lot of products are made of wood. However, trees are now in danger. People cut down millions of trees every year. Can you imagine the world without trees In fact, if we don’t start protecting them from now on, we’ll soon lose our friends, the trees. （二） Trees are our good friends Trees are very important in our daily life. They are our good friends. Trees keep the air cool and clean, they take in harmful gases from the air and produce oxygen for us to breathe. They are major fighters against air pollution and make cities beautiful. Trees make our lives more convenient. They provide a lot of useful things for people, such us paper, food and oil. Trees also stop water and soil from going away. In a word, we can’t live without trees. We should stop cutting down millions of trees every year. We should plant more trees and take care of them. Tree Planting Day Yesterday it was March 12 --- Tree Planting Day. We went to the hill to plant tress with our teachers. There we learned how to plant trees. We also learned a lot about plants. For example, trees can help clean the air. They give us food, such as apples, oranges, grapes, peached and pears. People and other animals need them to live. We planted a lot of trees yesterday. We were very tired, but we felt very happy.