2017春北师大版（三起）三下Unit 11《I Can》ppt课件1.pptVIP

He can jump. Can you jump? Yes, I can. He can walk. Can you walk? Yes, I can. He can run. Can you run? Yes, I can. He can speak. Can you speak? Yes, I can. I can climb. Can you climb? No, I can’t. I can jump. Can you jump? No, I can’t. I can walk. Can you walk? No, I can’t. I can run. Can you run? No, I can’t. I can speak. Can you speak? No, I can’t. be careful 和 look out 两者均有“小心、当心、注意” 之意，常用于祈使句或警告对方时的用语。 look?out 语气较强，用于某种紧急的情况或者可能 出现危险的场合； be?careful 是一般的警告或劝告用语，可用于各种情况。 如：Look out！You’ll hit that car． 当心！你要撞上那辆汽车了。??? ?Look out for the rock in the river. （后接for短语） 小心河里的石头。? It’s the first time for you to travel alone． You must??take care．?????????? 这是你第一次独自旅行，一定要小心。 ?? ??be careful 可单独使用，也可跟动词不定式 或of／with短语。如：???? Be careful not to lose the key．当心不要丢了钥匙。????????????????????????? ??You’ d better be careful with your handwriting.????????????????????????你最好书写认真些。????????????????????????? ??Be careful of your health．爱护你的身体。 can的特点 基本意思是“能、会”，是情态动词的重要成员。 she can jump. 她会跳。 个性：1.在句子中不能单独做谓语； 2.后面接动词原形： 3.没有人称和数的变化。 can的句式变化 can的肯定句式是：can+动词原形 She can run.她会跑。 …… sing swim ride a bike She can sing. He can swim. They can ride a bike. She can not sing. They can not ride a bike. He can not swim. 一、Say what the people in the picture can do. (根据图片提出句子) can的否定式 can + not+动词原形（常用缩写形式can’t） 1. she can walk. —she can not (can’t) walk. 2. I can speak. — ？ 二、把下列句子变为否定句。 1、Lingling can ride a horse. 2、He can speak Chinese. 3、Lingling and Daming can play the piano. 4、My father can play table tennis. 5、She can swim. can’t can’t can’t can’t can’t can的疑问句 can……？ 只需将can提到主语的前面。 1. I can climb. — ? 肯定回答和否定回答 肯定回答：Yes, 主语+can. 1. Can you jump? —Yes, I can. 否定回答：No,主语+can’t. 2. Can she play the piano. — No, she can’t. Exercise 1. Tom会骑自行车。 __________________ 2. She can sing.（将其变