【课件】Unit 5 Discover useful structures 课件高中英语人教版（2019）选择性必修第二册.pptx

Discoving Useful Structures P53 ;Translate these sentences into English. （1）你可以想象，烧伤会导致非常严重的伤害。 （2）治疗烧伤的第一步也是最重要的一步是进行急救。 （3）最好将烧伤处置于清凉的自来水下，尤其是在起 初十分钟内 （4）如果有必要，用剪刀把衣服剪掉，除非你看到布 料粘在烧伤的皮肤上。 （5）你可以用一块宽松干净的布覆盖烧伤部位。;Leading-in;Can you express the same ideas without using the -ing form? ;Can you express the same ideas without using the -ing form? ;Replace each underlined part with a suitable -ing form and rewrite the sentence as necessary. ;4. Because the child was not watched carefully by his parents, he touched a hot iron and burnt his finger. 5. After she had been bitten by mosquitoes, she applied some medicine to her skin.;复习动词-ing形式;　;（1）动词-ing形式作主语时，往往表示经常性、习惯性的动作，通常置于句首，谓语动词用单数。 Having a walk every day helps to make one keep healthy. 每天散步有助于一个人保持健康。。 Climbing mountains is really difficult for the old. 对于老人来说爬山确实困难。 ;（2）形式主语it代替动词-ing形式作主语。 此类句式常见的有： Its a waste of time doing sth.做某事是浪费时间 Its useless/worthwhile doing sth. 做某事没用/是值得的 Its no good/use/fun doing sth. 做某事没好处/没用/没意思 It is a waste of time persuading such a person to join us. 劝说这种人加入我们是浪费时间。 It is no good/use regretting for the past. 悔恨过去是没用的。;1. It is no use / good _______ (cry) over spilt milk. 2. It is useless _______(try) to explain. 3. It is a waste of time and money _______ (see) that movie. 4. There is no good / use (in) _______ (argue) with him. 5. There is no point (in) ________ (hurry) to get there.;2．作宾语;Key and difficult points ;禁止冒险凭想象: forbid, risk, imagine 难以忍受始反对: can’t stand, set about / get down to, object to 想要成功坚持忙: feel like, succeed in, insist on, be busy (in) ... 习惯放弃有困难: get used to, give up, have difficulty / trouble (in) ... 导致专心不推迟: lead to / contribute to, be devoted to, put off;A.接doing 和to do意思基本相同的常见的有: like, love, hate, prefer, continue, begin/start B.接动词 -ing 形式或 to do 作宾语时意义差别较大的动词有： remember/forg