Unit 6 Section A(Grammar Focus～4c)-【四清导航•河南专版】2022-2023学年八年级英语下册作业课件(人教版)

第三课时　Section A(Grammar Focus～4c) ——单元语法精讲精练 英语 八年级下册 人教版 四清导航 连词unless，as soon as，so/such...that...的用法 ►unless的用法 unless连词，意为“除非；如果不”，相当于if...not，引导条件状语从句。 We'll go to the town unless it rains tomorrow. ＝We'll go to the town if it doesn't rain tomorrow.如果明天不下雨，我们就去城里。 【注意】①若unless引导的从句本身为否定句，则unless不能用if...not来替换。②含unless的复合句，要遵循“主将从现”的原则。 2 ►as soon as的用法 as soon as意为“一……就……”，引导时间状语从句，表示从句和主句的动作先后发生，间隔短暂。 The students became quiet as soon as the teacher came in.老师一进来，学生们就安静下来了。 【注意】含as soon as的复合句要遵循“主将从现”的原则。 I'll write to you as soon as I get there.我一到那里就给你写信。 3 ►so/such...that...的用法 so/such...that...意为“如此……以至于……”，引导结果状语从句。其中so修饰形容词或副词，such修饰名词，that后的从句表示结果。 【注意】名词前有few，little，many，much等词表示程度时，应用so而不能用such。 He has so much money that he can buy what he wants.他有如此多的钱，以至于他可以买他想要的东西。 4 一、用方框中所给单词或短语的适当形式填空。 until，unless，so...that，so that，as soon as 1．These children are ____ poor _______ they can't go to school. 2．You won't pass the exam _______ you study hard now. 3．You should hurry up _______ we can catch the train. 4．In this city，it doesn't get dark _______ about nine o'clock during summer. 5．___________ she opened the door，a cat ran out. so that unless so that until As soon as 二、写出下列句子的同义句。 6．He turned on the TV at once after he came back. He turned on the TV ___ ______ ___ he came back. 7．They ran very fast in order to catch the bus. They ran very fast ____ ____ they could catch the bus. 8．We'll go hiking unless it rains tomorrow. We'll go hiking ___ ___ _______ _____ tomorrow. 9．If they don't have time now，we will put off the meeting. We will put off the meeting _______ they have time now. 10．The boy was too young to go to school. The boy was ____ young _______ he couldn't go to school. as soon as so that if it doesn't rain unless so that 6 一、用方框中所给单词的适当形式填空。 1．Mr. Brown looks very kind because he always _______ at his students. 2．The sweater doesn't _______ me.It's too large. 3．The _______ turned into a f