《英语七年级下Unit 4 Don’t eat in class》课件

Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
What do you have to do?
We have to be quiet in the library.
Warming up
以后要注意 啊。回到座 位上吧。
对不起！ 老师，我 迟到了。
Can we _a_r_r_iv_e_l_a_t_e_f_o_r_c_l_a_ss__? No, we can’t. We must _b_e_o_n__ti_m__e. Don’t _a_r_r_iv_e__la_t_e_f_o_r_c_l_a_s_s.
Don’t run in the hallways.
Don’t fight.
What are the rules?
We must be on time for class.
Can we eat in the classroom?
No, we can’t, but we can eat in the dining hall.
Warming up
Can we_e_a_t_i_n_c_l_a_ss__? No, we can’t. We must __e_a_t___ _in__t_h_e_d_i_n_in__g_h_a_l_l ____. Don’t _e_a_t_i_n_c_l_a_s_s_______.
Warming up
Don’t fight. We must be on time for class. No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class?
Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
have to在句法上与 其他情态动词有 何区别？
have to有人称和数 的变化。
Grammar Focus
语法概述
祈使句一般用来表示请求、命令、劝说、号召、警告等。 在祈使句中，通常省略主语you，其肯定形式以动词原形 开头，否定形式是在动词原形前加don’t。祈使句句尾用句 号或感叹号，读时用降调。为表示礼貌，可以在句首或句 尾加上please。句末用please时，前面通常加逗号。
No, we can’t. We must _l_is_t_e_n_t_o_ _o_u_r_t_e_a_c_h_e_r__. Don’t _li_s_te_n__t_o_m__u_s_ic__in__c_la_s_s___.
Warming up
Can we __f_i_g_h_t___?
No, we can’t. We must __b_e___ _fr_i_en__d_ly__to__e_a_c_h_o_t_h_e_r__. Don’t ___f_ig_h_t_________.
Grammar Focus
Don’t run in the hallways.
Don’t fight.
What are the rules?
We must be on time for class.
Can we eat in the classroom?
No, we can’t, but we can eat in the dining hall.
情态动词在用法上 有什么共同点？
can, must, have to后接 动词原形。
Grammar Focus
Don’t run in the hallways.
Don’t fight.
What are the rules?
We must be on time for class.
Can we eat in the classroom?
Presentation
Brainstorm
In class
We can’t _____________. We must _____________. We have to ___________.
Presentation
Brainstorm
At school
We can’t _____________. We must _____________. We have to ___________.
Presentation Do 型祈使句的构成
肯定句：动词原形 (+宾语)+其他. 否定句：Don’t+动词原形 (+宾语) +其他. ➢ Wear the school uniform on weekdays, please. 上学
日请穿校服。 ➢ Don’t watch TV before dinner. 晚饭前不要看电视。
Can we wear a hat in class?
Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
What do you have to do?
We have to be quiet in the library.
Don’t fight.
What are the rules?
We must be on time for class.
Can we eat in the classroom?
No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class?
《英语七年级下Unit 4 Don’t eat in class》
Warming up
Game time
Mine sweeping
扫雷游戏
单词下埋着6颗雷，学生选择单词并读出， 如果单词下没有雷则可得分，如果有，则不得分。
Warming up
schoo2l rules wear
fight
so3rry
或Let+宾语+not+动词原形+其他. ➢Let’s have a rest. 咱们休息一下吧。 ➢Don’t let him go swimming. = Let him not go swimming. 不要
让他去游泳。
Presentation 其他类型的否定祈使句
(1) No+v-ing! / No+名词! ➢No fishing! 禁止钓鱼! ➢No parking! 禁止停车! ➢No photos! 禁止拍照! (2) never 代替don’t 来加强语气。 ➢Never give up! 决不放弃!
Don’t fight.
What are the rules?
We must be on time for class.
Can we eat in the classroom?
No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class?
Presentation Be 型祈使句的构成
肯定句：Be+表语+其他. 否定句：Don’t+be+表语 +其他. ➢Be careful next time.下次要细心。 ➢Don’t be late for school! 上学不要迟到!
Presentation Let 型祈使句的构成
肯定句：Let+宾语+动词原形+其他. 否定句：Don’t+let+宾语+动词原形+其他.
Can we wear a hat in class?
Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
What do you have to do?
We have to be quiet in the library.
Presentation
Brainstorm
At home
I can’t _____________. I must _____________. I have to ___________.
Presentation
How to talk about rules?
Grammar Focus
Observe this chart.
祈使句的否定句 怎样构成？肯定 句呢？
祈使句的否定句在动词原 形前加don’t，表示“不要 做什么事”。
祈使句的肯定句通常是以 动词原形开头的。
Grammar Focus
Don’t run in the hallways. What are the rules?
Can we eat in the classroom?
Can we _s_l_ee_p__in__c_l_a_ss___?
No, we can’t. We must _l_is_t_en__t_o_ _th__e_t_ea_c_h__er__c_a_re_f_u_l_ly__. Don’t _s_l_e_e_p_i_n_c_l_a_s_s _____.
be q1uiet br3ing
usncihf1ooorml m1ust
eat in2class dining hall have to
run in the ha1llways arforirvc3elalastse
liste1n to on 1time
out4side important
do2n’t hall c2an
Warming up
Can we _r_u_n__in__t_h_e_h_a_l_lw__a_y_s___? No, we can’t. We must __w__a_lk____. Don’t _r_u_n__in__t_h_e_h_a_l_lw__a_y_s__.
Warming up
Can we _li_s_te_n__to__m__u_si_c_i_n__cl_a_s_s__?
Warming up
Ca _sc_h_o_o_l____? No, we can’t. We must __w_e_a_r__ _t_h_e_s_c_h_o_o_l _u_n_i_fo_r_m______. Don’t _w__e_a_r_a_h__a_t _a_t_s_c_h_o_o_l __.
Grammar Focus
Work in pairs and answer the questions.
1. 祈使句的否定句怎样构成？肯定句呢？一般在什么情况 下会用祈使句？
2. 情态动词在用法上有什么共同点？ 3. can在本单元主要表示什么含义？它还可表达什么意思？ 4.have to在句法上与其他情态动词有何区别？
No, we can’t, but we can eat in the dining hall.
Can we wear a hat in class?
Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
What do you have to do?
We have to be quiet in the library.
一般在什么情况 下会用祈使句？
祈使句一般用于上级对下 级，长辈对晚辈之间，表 示命令、劝说或警告，也 可表示请求。
Grammar Focus
Don’t run in the hallways.
Yes, we can./No, we can’t.
Does he have to wear a uniform at school? Yes, he does./No, he doesn’t.
What do you have to do?
We have to be quiet in the library.
What do you have to do?
We have to be quiet in the library.
can在本单元主要表 示什么含义？它还 可表达什么意思？
can的意思是“能够； 允许“，还可表示 “能力” 。
Grammar Focus
Don’t run in the hallways.