新概念英语青少版3B Unit 18

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11
New words and expressions
fight
Fighting!
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12
Grammar
Whether 与if
引导宾语从句,一般既可用whether也可用if.
但是
（1）or not放在whether之后时,只能用whether 不用if. E.g., I don’t know whether or not he will come.
Tag line, tag line
Unit 18 Learning the rules！
Listening and understanding
ROBERT: Dad! Have you asked Mum yet? WILLIAM: What about? ROBERT: Have you asked Mum if I can start karate lessons? WILLIAM: No, I haven’t. I’ll.. Shh! She’s coming.
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Listening and understanding
KAREN: What are you two whispering about? ROBERT: Oh, er, nothing! I’m just going upstairs. See you later, Dad! WILLIAM: Yes, of course.
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Listening and understanding
KAREN: What’s the mystery? Is Robert all right? WILLIAM: He’s fine. He just wants me to ask you something. KAREN: Why doesn’t he ask me himself? WILLIAM: He’s afraid that you’ll say no.
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Listening and understanding
WILLIAM: It’s a martial art! It’s about fighting! KAREN: All competitor are a kind of fighting. The martial arts are also about rules!
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New words and expressions
whisper
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பைடு நூலகம்
8
New words and expressions
upstairs
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9
New words and expressions
afraid
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10
New words and expressions
whether
我不知道他是不是回来.
（2）在强调任意选择时,用whether…or,此时不用 if替换whether. He asked me whether I wanted to go there by train or by bus.他问我是想乘火车还
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Grammar
Whether 与if 引导宾语从句,一般既可用whether也可用if.
once. 我不知道是不是该立刻去那里.
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Guided Conversation
1. Would you like to learn karate? Why? / Why not?
2. What new sport or activity would you like to learn? Why?
但是 （3）虽引导宾语从句,但为了强调宾语部分,也可
把从句放在句首,此时只用whether不用if. Whether he will come I am not sure. 他是不是来我拿不准. （4）从句作介词宾语时只用whether不用if. It depends on whether it will be fine. 那得看是不是晴天.
他问我如果我得到那份工作是否会搬家到纽约.
（6）如果宾语从句为否定句时,则只用if不用 whether. I don’t know if it won't rain tomorrow..我 不知道明天是不是会下雨.
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用在动词不定式之前时用whether不用if. I don’t know whether to go there at
3. Do you think martial arts are a good thing for young people? Why? / Why not?
4. Karen says, ‘All competitors are a kind of fighting. The martial arts are also about rules.’ What do you think?
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Grammar
Whether 与if
引导宾语从句,一般既可用whether也可用if.
但是
（5）句子中有if引导的条件句,如再有表示“是否 ”的宾语从句,用whether不用if. He asked me whether I’d move to New York if I got the job.
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Listening and understanding
KAREN: Oh, it that all! You worried me! ROBERT: Do you mean that you don’t mind? KAREN: Of course I don’t mind! Why would I mind? Karate’s a sport, isn’t it?
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Listening and understanding
KAREN: Oh, dear! What is it, William? WILLIAM: Robert wants to learn karate. He doesn’t know whether you’ll let him.
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