发布时间 : 星期六 文章2020新仁爱英语Unit6 Topic3 Secti更新完毕开始阅读
祈使句是用来表示请求、命令或建议的句子。祈使句中的主语常常被省去。句末用句号或感叹号，一般用降调读。祈使句的谓语动词无时态和数的变化，统一用原形。 一.肯定结构：
1. Do型。即“动词原形+宾语+其他”。Open the door, please!请开门。 2. Be型。即“Be+表语+其他”。 Be quiet for a moment.你请安静一会儿。 3. Let型。即“Let+宾语+动词原形+其他”。 Let's play volleyball.让我们打排球吧。 二.否定结构：
1. Do型和Be型的否定式都是在句首加don't构成。 Don't mention it.别提它。 Don't be late again.别再迟到了。 2. Let型的否定式有两种。
当let后的宾语为第三人称时，在句首加Don't；
当let后的宾语为第一人称时，用“Let +宾语+not+动词原形+其他”结构。
Don't let the children make much noise.不要让孩子发出大的噪声。
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Let's not worry about our problems.让我们不要担心我们的问题。 3.“No +名词或动名词”，常用于日常生活中的警示语。
No entry.禁止入内。No parking.禁止停车。 “通过”面面观
1. across是介词，强调从一定范围的一边到另一边，且在物体表面或沿着某一条线的方向而进行的动作。
e.g. My house is across the river.我家在河对岸。 You can go across the bridge.你可以越过这座桥。 2. cross是动词，表示“穿过，越过，渡过”。 e.g. Don't crossthe road.别穿过马路。
The boy is crossing the street.那男孩正穿过街道。
3. across from在……对面e.g. The school is across from the post office.学校在邮局对面。
4. past也是介词，指从某物旁边经过,意思是“走过……，经过……”。 e.g. He often walks past me without saying“Hello”.他经常不打招呼从我身边走过。
Our school bus drives past the Great Hall of the People(人民大会堂).我们乘坐的校车经过人民大会堂。 本课小结：
通过本节课的学习，我们掌握了一些交通规则的英文表达，学习了祈使句以及它的否定形式。 课后巩固练习
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SectionC练习（答案在Section D练习） 一、根据句意及汉语提示补全单词。 1.—What do your parents do?
—______(两个都) of them are teachers.
2.When you don't obey the traffic ______(规则), you may get hurtor lose your life.
3.Don't drive too fast, or you may be in ______(危险).
4.It's good for children and old people to be ______(小心的) when they go
across the bridge. 5.—Where's Jane?
—She is looking for the ______(票) to themovie in her room. 二、单项选择。
1.We can _____ the street when we see the green“walk”sign. A.goB. walkC.acrossD.cross 2.—Peter, _____ in the library. —I'm sorry. I won't do it next time. A.not playB. no playC. don't playD. play
3.—Please look after your sister _____ I come back. —OK, Mum.
A.andB. afterC.beforeD. or
4.It's good ____ the old ____ the bus. A.to help; get onB. to help; togetC.help; get on
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5.—What are your parents? —They ____ office workers.
A.are allB. are bothC. all areD. both are
三、根据括号内的汉语提示完成句子，每空一词。
1.David ______ ______ (受伤) in a traffic accident. We should bevery careful.
2.We should ______ ______ (保持安全) when we ride bikes onthe road 3.It's a ______ ______ (好地方) to visit. We should go to visit it. 4.We must obey the ______ ______ (交通规则) when we walk on thestreet.
5.Don't ride ______ ______ (太快). We should be carefulhere and there. 四、根据要求改写句子。
1.You must never play in the street.(改为同义句） ____________ in the street.
2.Do your homework after school.(改为否定句） ____________ your homework after school.
3.You should never drive after drinking.(改为祈使句） ____________ after drinking!
4.How can I get to the Zhongshan Park?(改为同义句） Canyou tell me the ______ ______ the Zhongshan Park? 5.They need to take the No. 88 bus.(对画线部分提问） ______bus do they ______ to take?D. help; toget Section C参考答案及解析
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一、1.Both2. rules3. danger4. careful5. ticket
二、l.D由常识可知绿灯行，cross thestreet“穿过街道”。2.C由答语可知上句是不让彼得在图书馆里玩。3.C由句意可知“在我回来之前，照顾好妹妹”，故选before。4.AIt's+adj.+to do sth.固定搭配；help后可加不定式，to也可省略；geton the bus“上车”。5.B父母为两个人用both，且放在系动词之后。 三、1.got hurt2. keep safe3. good place 4. traffic rules5. toofast 四、1.Don't play/Never play 2. Don't do3. Don't ride 4. way to5.Which; need
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