Unit 4 Section A单元知识点讲解2022-2023学年人教版英语八年级下册

Unit 4 Why don’t you talk to your parents? Section A 教材知识全解 讲透知识 查漏补缺 知识点一 allow的用法 教材原文 My parents don't allow me to hang out with my friends.我的父母不允许我和我的朋友们出去闲逛. allow作动词,意为“允许;准许”,allow sb.to do sth.意为“允许某人做某事”,也可以是allow sb.sth.. His parents won't allow him to stay out late.他的父母不允许他在外面待到很晚. Each passenger is allowed 20 kilograms of baggage.每位旅客准许携带20千克行李. 注意allow sb.to do sth.的被动结构是“sb.be allowed to do sth.”,该结构表示“某人被允许做某事”. We are allowed to choose our own clothes.我们被允许选择自己的衣服. The children are not allowed to play on this lawn.孩子们不准在这块草地上玩耍. 拓展 allow doing sth.意为“允许做某事”. They don't allow smoking here. =They don't allow people to smoke here.他们不允许在这儿抽烟. 例1(2020河北邢台临西一中期中)Mom doesn't allow me________ up too late. She says it is bad for my health. A. stay B. to stay C. staying D. stays 解析 句意:妈妈不允许我熬夜太晚.她说那对我的健康有害.allow sb.to do sth.意为“允许某人做某事”.故答案 选B. 答案 B 知识点二 What's wrong?的用法 教材原文 What's wrong?怎么了? wrong作形容词,意为“有毛病的;错误的”. There's something wrong with my bike.我的自行车出毛病了. I'm sorry to tell you that your answers are wrong.我很遗憾地告诉你,你的答案错了. 拓展wrong的延伸 false adj.错误的incorrect adj.不正确的 right adj.对的;正确的correct adj.正确的 例2(2020湖北襄阳高新区期末)-Is there anything________ with your camera? -Yes, It doesn't work now. A. clever B. wrong C. fair D. clear 解析 句意:-你的照相机有什么故障吗?---是的,现在它坏了.clever意为“聪明的＂;wrong意为“有毛病的;错误的＂;fair意为“合理的”;clear意为“清楚的;明白的”.由答语可知答案选B. 答案 B 知识点三 because 引导原因状语从句的用法 教材原文 I'm really tired because I studied until midnight last night.我真的很累,因为我昨天晚上一直学习到半夜. because是连词,意为“因为”,引导原因状语从句.because 和so不能同时使用. He will sell his house because he needs money.因为他需要钱,所以他将出售他的房子. 知识点四until的用法 教材原文 I'm really tired because I studied until midnight last night.我真的很累,因为我昨天晚上一直学习到半夜. until在此处作介词,意为“直到······为止”. I'd like to stay here until Christmas.我想在这儿一直待到圣诞节. 拓展 until还可以用作连词,引导时间状语从句. 用于肯定句时,主句的动词用延续性动词,它所表示的动作一直持续到until表示的时间为止,意为“直到······为止” We'll wait until the rain stops. 我们将一直等到雨停. 用于否定句时,主句的动词一般是非延续性动词,它所表示的动作直到until所表示的时间才发生,意为“直到······(才)” They did not return home until