泸教牛津版七年级下册Unit 6 Electricity grammar公开课件

1、grammar: modal verbsdo homework.what do you usually do at home in your what do you usually do at home in your free time?free time?play games.what do you usually do at home in your what do you usually do at home in your free time?free time?help parents do some housework.what do you usually do at home

2、 in your what do you usually do at home in your free time?free time? johnny is a helpful boy. today, he wants to help his father do some housework. what is johnny going to do? can/may he do it now? why or why not? he is going to change the bulb.no, he cant/may not. because he must turn off the elect

3、ricity first.modal verbsmodal verbs情态动词情态动词can cannot(cant)may may notmust must not情态动词具有一定的词义，但不能独立存在不能独立存在，须与动词原形一起构成谓语，表示说话人对动作的观点，如意愿、需要、可能或怀疑等。情态动词没有人称和数的变化。can & cannot0101can be able to “能”，表示能力 i can/am able to sing an english song. 我可以唱一首英语歌曲。表示许可或请求对方允许，意为“可以” can i use your dictionary

4、?我可以用你的字典吗？ 过去式：could 我十年前就能做到那样。i could do that 10 years ago.否定式： cannot = cant情态动词情态动词can的用法的用法 用用can 和和cannot 填空填空dogs _ guard peoples home.dogs _ produce milk.dogs _ fly in the sky.dogs _ rescue people.dogs _ lead the blind.cancannotcannotcancanstructure:_+_+_.s(主语主语)can/cannotdo can dogs dig ho

5、les?_ can dogs play badminton?_structure: (question) _+_+_ ?(answer) yes, _./ no,_.s(主语主语)candos(主语主语) cans(主语主语) cantyes, they can.no, they cannot (cant).what can he/she do?yes, he/she can.no, he/she cant.swim?ride a bike?speak english well?dance well?take good photos?interviewinterview your partne

6、r about what he/she can do. take notes with “” and try reporting it to others.p my partner is xxx. he/she can. but he/she cant cancannotcannotcancannotcancancannotmay & may not02 can i smoke in the room? can i turn on the fan, please?we also use can to ask for and give permission(允许). 我们可以用can表示

7、许可或请求对方允许 may i smoke in the room? may i turn on the fan, please?can and may are for the same purposes.can和may都表达同样的目的may 表示允许may 表示许可或请求对方允许，意为“可以”，相当于can。 两者的区别在于：表示请求许可时，may更能表示礼貌或敬意。 may i watch tv now, grandma? no, you may not/cant/mustnt. 外婆，我现在可以看电视吗 ? 不，你不可以。情态动词情态动词may的用法的用法否定式： may not意为“不

8、可以”。may构成的一般疑问句及其回答形式如下： may i .? (肯定回答) yes, you may. (否定回答) no, you may not. may i open the door? may i watch tv now, grandma? no, you may not.structure:(question) _+_+_ ?(answer) yes, _. / no, _.mays(主语主语)dos(主语主语) mays(主语主语) may not.use may to ask questions according to the situations below.exer

9、ciseyou finish your homework and you want to play computer games. what would you ask your parents? (play)may i play computer games?example 1. you want to phone your parents, but you dont have a mobile phone. what would you ask your teacher? (use)may i use your mobile phone?2. you want an ice cream,

10、but you have no money. what would you ask your friend? (borrow)may i borrow your money?3. it is hot. but the fan in your classroom is off. what would you ask your teacher? (turn on)may i turn on the fan?4. your mum is watching tv. the tv is very loud and you are studying now. what would you ask your

11、 mum? (turn off)may i turn off the tv?you may not climb the tree.you must not climb the tree. must & must not0303must and must not you must turn off the electricity first.you mustnt/ must not say that, benny!we use _ to tell people what to do.we use _ to tell people what not to do.must i turn of

12、f the electricity first?yes, you must. no, you neednt/ dont have to. mustmust not情态动词must 的用法：表示必须/一定。其否定形式mustnt 表示_。由must引起的一般疑问句，其否定回答要用_ 。禁止neednt/dont have to you _ here. you _ here. you _ here. you _ here. p tell what do the signs mean.mustnt smokemustnt drink or eatmustnt ride a bikemustnt ta

13、ke photosguessing gameguess the jobs according to the description. i can save peoples lives. i can take care of people. i must finish my jobs very carefully. do you know who i am? doctorlavzcook i can taste many kinds of food every day. i can cook delicious dishes. i must wash my hands before i work

14、. do you know who i am? teacher i can share my knowledge with the young. i can help the young solve problems on study. i must correct homework every day. do you know who i am? policeman i can catch the thieves. i can fight with the bad guys. i must protect people from being hurt. do you know who i am? summarywe learn three modal verbs today. they are _. we use _ to tell people what we are able to do. we use _ to ask for and give permission. we use