Unit5 The human brain 重点语法：条件状语从句（三大题型，60题）-2024-2025学年九年级英语上册重难点讲练全攻略（牛津上海版）

Unit 5 The human brain 重点语法：条件状语从句（三大题型，60题） 目录 语法知识精讲 1 语法知识精练 2 题型一：if/only if引导条件状语从句 2 题型二：unless引导条件状语从句 3 题型三：as long as引导条件状语从句 5 参考答案： 7 语法知识精讲 条件状语从句 1．if和unless引导的条件状语从句。if表示正面的条件，意为“如果”；unless(＝if ... not)表示反面的条件，意为“除非，如果不”。 If you had come a few minutes earlier, you would have met him. 要是你早来几分钟就碰到他了。 You'll fail the exam unless you study hard(＝if you don't study hard)． 除非你努力学习，否则你考试会不及格。 2．in case, on condition that等词汇意思相近，意为“万一，假使，假如，在……条件下”。 In case there is a fire, what will we do first 万一发生火灾，我们首先要做什么？ They agreed to lend us the car on condition that we returned it before the weekend. 他们同意把车借给我们，条件是我们在周末前归还。 3．as long as(＝so long as)引导语气强烈的条件状语从句，意为“只要”。 As long as you don't lose heart, you will succeed. 你只要不灰心，就会成功。 4．在“祈使句＋and/or/or else/otherwise＋陈述句”句型中，祈使句在意义上相当于条件状语从句。 Run faster and you'll catch the bus. 跑快点，你就会赶上公共汽车的。 Work hard, otherwise you'll fail. 努力干，要不你就会失败的。 5．if only “如果……就好了”和only if “只有”也可以引导条件状语从句。但是当only if置于句首时，主句部分倒装。 If only I were as clever as you. 我要是像你一样聪明就好了。 Only if a teacher has given permission is a student allowed to leave the classroom. 学生只有得到老师的许可才能离开教室。 语法知识精练 题型一：if/only if引导条件状语从句 1．（2023·上海金山·二模）If Rose the interview next week, she will have the chance to work for the school studio. A．pass B．will pass C．passes D．passed 2．（2023·上海徐汇·二模）_____ kids have smartphones, they may get calls from strangers and get cheated. A．If B．Until C．Though D．Unless 3．（22-23九年级上·上海徐汇·期末）Computers can do different jobs _____ we give them different programs. A．if B．although C．before D．so that 4．（2021·上海闵行·一模）There will be fewer accidents _____ all of us obey the traffic rule. A．if B．unless C．though D．because 5．（2021·上海徐汇·二模）_____ you eat too much junk food, it can finally do harm to your body one day. A．If B．Although C．So D．Or 6．（2022·上海奉贤·一模）“You mustn’t bring your mobile phones to school, _____ you will be against the law,”the teacher said to the students. A．so B．and C．but D．if not 7．（2022·上海浦东新·二模）Hurry up! _____ we miss the last bus, we’ll have to get home on foot. A．Because B．Although C．Since D．If 8．（2020·上海·中考真题）Vivian will take her daughter to the amusement park_____she gets the tickets． A．if B．until C．although D．unless 9．（22-23九年级上·上海静安·期末）ChatGPT can finish many different tasks _____ you “chat” with it. A．if B．unless C．before D．but 10．（23-24九年级上·上海黄浦·期中）The kids are taught to stay calm and go out of the building one by one _____ th ... ...