(
课件网) UNIT 8 Let’s communicate! 第3课时 （Section A GF 3a-3c） Enjoy a song 什么是条件状语从句？ 什么叫条件？如果.....(发生某件事)，那么....(就会发生另外的一件事) 2 Presentation Part 2. Read the sentences. 3a Find the similarities(相似性) of these sentences. If you want to solve the problem, a face-to-face talk usually works the best. Texting can make things worse if you’re not careful with your words. If the rehearsal ends at 7:00 p.m., I’ll pick you up at 7:15 p.m. If you stay calm and say sorry, it will help. If I go there, I will try all the delicious local food. if 条件句， if 引导的是从句 结构、 1.If+从句，主句。 2.主句+if 从句。 2 Presentation Part 3. Read the sentences. Find more sentences with if-clauses in Section A. 3a What are the tenses of the main clause(主句) and the subordinate clause(从句) If you want to solve the problem, a face-to-face talk usually works the best. Texting can make things worse if you’re not careful with your words. If the rehearsal ends at 7:00 p.m., I’ll pick you up at 7:15 p.m. If you stay calm and say sorry, it will help. If I go there, I will try all the delicious local food. if 引导的是从句 一般现在时 一般将来时 一般现在时 含情态动词的一般现在时 zero conditional sentence 零条件句 first conditional sentence 第一条件句 一般将来时 一般将来时 1.零条件句 Zero conditionals 零条件句，指表达客观真理（如科学事实）或习惯性动作的句型。 eg. If you water to 100C, it . 如果你把水加热到100度，水就会沸腾。 If the sun , it dark. 如果太阳下山了， 天就会变黑。 heat boils sets gets if+一般现在时，主句+一般现在时 1.第一条件句 First conditionals 第一条件句，用于描述将来可能发生的情况。 eg. (1)If it sunny tomorrow, they camping。 is will go 1.if+一般现在时，主句+一般将来时,"主将从现" 如果明天是晴天，他们就去露营。 （2）主句是含有情态动词 must,can, may, might, should could，would等的句子。 ◆ If we right away, we finish the work on time. 一般现在时 情态动词 从句 主句 如果我们马上开始，就能按时完成这项工作。 start can 1.if+一般现在时，主句+情态动词,"主情从现" （3）主句是祈使句。 ◆ if you to pass the exam. 祈使句 一般现在时 从句 主句 如果你想通过考试，就得努力学习。 Work hard want 1.if+一般现在时，主句用祈使句,"主祁从现" 3b Match the two parts to make sentences. 1. If we can have a face-to face meeting, 2. If I have good news, 3. If you need to leave, 4. If you can finish your work early today, 5. If the old man has difficulties in hearing, 6. If you can’t reach her by phone, A. try texting. B. we’ll understand each other better. C. you can write things down for him. D. I’ll call you right away. E. I’ll call a taxi for you. F. will you join me for dinner join sb for sth 与某人一起做某事；参与或加入某人的行列中一起做某事 have difficulties (in) doing sth 做某事有困难 right away 立即；马上 write down 写下；记下 B D E F C A if 从句 主句 try to do sth努力做某事 try doing sth 尝试做某事 3c Fill in the blanks with the correct forms of the verbs in brackets. ... If things ... ...
