(
课件网) Section 2 Grammar Unit 7 The secret of memory 2024新版沪教牛津8年级上册 海上列车 在列车消失之前，学生快速回答所需要填的空 If she is busy, I ____ help her. Get up early, ____ you’ll miss the first bus. Study hard, ____ you’ll get good grades. Conditional Sentences 概念 条件状语从句: 从句在句中作条件状语成分。 由从属连词if, unless, as / so long as等引导，与主句连接。 从句位于句首，常用逗号与主句分开，若在句末，其前一般不加逗号。 引导词 例句 注意事项 if(如果) If she is busy, I will not bother her. 从句的时态不可用将来时，只能用现在时表将来时。(主将从现) unless (除非；如果不) Unless it rains, the game will continue. = If it doesn’t rain, the game will continue. as / so long as (只要) As long as you can take good care of it, you can keep it as long as you want. 引导词 条件状语从句的时态问题 As soon as I pass the exam，my mom will give me 100yuan as a reward. I will play badminton with my friends if it doesn’t rain today. 条件状语从句→主将从现 注意 主句不遵循“主将从现”的情况 1. 主句中出现情态动词 e.g. If you have questions, you can ask me. 2. 主句是祈使句 e.g. Ask me if you have questions. 3. 主句是客观事实，用一般现在时 e.g. If you put the paper into a fire, it burns. 条件状语从句与祈使句的转换 1.祈使句, + and + 陈述句 =if引导的条件状语从句+陈述句 Get up before 5, and you’ll see the beautiful sunrise. = If you get up before 5, you’ll see the beautiful sunrise. 条件状语从句与祈使句的转换 2.祈使句, + or + 陈述句 =(if … not)引导的条件状语从句+陈述句 Get up before 5, or you won’t see the beautiful sunrise. = If you don’t get up before 5, you won’t see the beautiful sunrise. Grammar practice Read these if-clauses and match them with the results. You won’t pass the exam _____ you study harder. If it _____ (rain) tomorrow, we will stay at home and watch TV. _____ you hurry up, you will be late for the meeting. I will call you if I _____ (get) the news. You can’t get good grades _____ you listen carefully in class. Unless she _____ (come) here this afternoon, we won’t wait for her. If they are free tomorrow, they _____ (go) to the park. _____ you want to be healthy, you should eat more vegetables and fruits. He won’t finish the work on time _____ he works hard. Unless it _____ (snow), we will go on a picnic this weekend. More practice 用所给词的适当形式填空或者填入适当的引导词。 unless rains Unless get unless comes will go If unless snows My name’s Tom, and I’m a Grade 8 student. Many of my classmates think Grade 8 is challenging, so I would like to share my tips on studying. First, we need to use the right methods when we study. _____ we use good study techniques, it will be very hard to remember things. For example, many students take notes in class, but they don’t look at them afterwards. _____ we don’t review our notes regularly, we will quickly forget what we’ve studied. It’s also very important to get enough sleep. If we stay up late, we _____ (be) very tired the nex ... ...
