Unit4 重难点讲解2022-2023学年沪教牛津版英语七年级下册

一、词汇 单词 词性及词义 词汇拓展 save v. 拯救；节省 savable adj.可节省的 discuss v.讨论 discussion n.讨论 fight v. 与……作斗争 fighter n.打斗的人 against prep.反对 again adv.再次 harmful adj.有害的 harm n.伤害 produce v.产生 producer n.生产厂 major adj.主要的 majority n.大多数 convenient adj.方便的 convenience n.方便 imagine v.想象 imagination n.想象 二、词组 take in 吸收 take into考虑到，采取 come from 来自 be from 来自 in fact 确切地说 actually 实际上 be made of 由……制成 be made from 由……制成 millions of 大量的，数以百万计的 hundreds of, thousands of be good for 对……有用，有好处 be good at 擅长于 【针对练习】 一、根据句意及首字母提示填写单词，使句子完整、通顺。 1.The air is a kind of g ________ with no colour and smell. 2.Mr Liu bought a lot of f________ for his new house. 3.There is a big h________ on the sweater, so Ben doesn’t want to wear it. 4.Some animals are in danger. We need to s________ them. 5.If there is no o________, people can’t live on Earth. 6.We should f________ against air pollution to protect our home. 7.It’s c________ for people to use an email to keep in touch with (与…保持联系) friends. 8.The box is too heavy, so I can’t c________ it. 9.I often i________ a life with a robot doing all my work. 10.Lisa is going to d________ a hole in the garden to plant an apple tree. 二、根据汉语意思完成句子，每空一词。 1.树木需要吸收水分来存活。 Trees need to________ ________ water to live. 2.有很多方法来放松自己。例如，你可以听音乐。 There are many ways to relax yourself.________ ________, you can listen to music. 3.确切地说，因为有他的帮助我才能按时完成工作。 ________ ________, I could finish the work on time because of his help. 4.不要环顾四周，认真听课。 Don’t________ ________. Listen carefully in class. 5.每年，数以百万计的鸟儿来这里过冬。 Every year, ________ ________ birds come here to spend their winter. 三、重点考点和难点分析 1. If I plant this seed in the ground，will it become a pear tree，Hi？ 由if 引导的条件状语从句，表示”如果”, ①如果主句（包括祈使句、含有情态动词can、may、must）用一般现在时，从句也要 用一般现在时； ②主句是一般将来时，从句要用一般现在时表示将来。 巩固练习1 如果你努力学习，将会取得进步。 If you work hard, you progress. 2.They help fight against pollution. fight vi. 与….斗争，常与介词against或with连用。 如：They fought against th