[中学联盟]江苏省太仓市实验中学九年级英语上册牛津译林版教案：Unit 6 (8份打包)

课 题 Grammar B 课时安排[来源:学科网] 共需8 课时 授课日期[来源:Zxxk.Com] 第 5 课时 教学目标 To learn to use unless 教学重点 To learn to use unless 教学难点 To master the usage of the clause with unless 预习作业 教学内容及过程 二次备课 Step 1:课堂导学与互动 B Using unless 1.Lead-in Ask the students to translate the following sentences: 1. 除非下雨，否则我们明天要去公园。 （We will go to the park tomorrow unless it rains.） 2. 除非你帮我，否则在本月底之前我是完不成这项工作的。 （Unless you help me, I will not finish the work before the end of this month.） 2.Work out the rule We can use useless to say that something can only happen or be true in a particular situation. Sometimes we can use if… not to replace unless. unless在意义上可以理解为if…not，在有些情况下两者可以互换使用。如： I can't see unless I wear glasses. (=I can't see if I don't wear glasses.) Unless you can pay your bills, you’ll have to leave. (=If you can't pay your bills, you’ll have to leave.) 从上面的例子可以看出，由于unless已经表达了if…not的含义，它所引导的条件状语从句只能使用肯定形式。 3.Presentation Ask the students to rewrite the sentences above using if … not. 1. We will go to the park tomorrow unless it rains. We will go to the park tomorrow if it doesn’t rain. 2. Unless you help me, I will not finish the work before the end of this month. If you do not help me, I will not finish the work before the end of this month. 4.Work out the rule We often use the simple present tense in the unless-clause. We need a comma after the unless-clause when it is the first part of a sentence. (1)主句为肯定句。如： You will miss the bus unless you hurry up. You'll fail your Chemistry test again unless you work harder. (2)主句为否定句或含有表示否定意义的词。如： Unless you are friendly to people, you won't get on well with them． You will never get anywhere unless you set your goal． 5.Practice 完成书上相关的练习，并核对答案。 Step 2：知识拓展 1. 在以when，before，as soon as等引导的时间状语从句，也适用“主将从现”原则，即如果主句是一般将来时，从句则用一般现在时。 　I'll tell her the good news when she comes back. 当她回来的时候，我将把这个好消息告诉她。 　 She will give you a call as soon as she returns. 她一回来就会给你电话。 2. If条件句==祈使句，and /or+将来时态的陈述句。<同义句