(共18张PPT)
Module4 Unit1 A visit to a farm
把你们收集到的标志语跟大家一起分享吧!
Don’t step on the grass!
Don’t smoke in public!
重点单词
大家一起来连连线吧~~~~
1.猪不吃干草。
2.母鸡下了蛋就咯咯的叫。
3.羊喜欢吃草。
4.昨天我喂过鸟了。
5.他在说废话。
A. I fed the birds yesterday.
B. Sheep like to eat grass.
C. Pigs don't eat hay.
D. He is talking rubbish.
E. The hen cackles when she has laid an egg.
C|E|B|A|D
知识梳理1:祈使句
祈使句表示要求或命令别人做某事或不要做某事。即表示表示请求、命令等的句子。
它的主语是听话人(you) ,一般不需要说出来。通常以动词原形开头。
肯定式:以动词原形开头(有时有please)
否定式:don't+动词原形开头(有时有please)
祈使句末尾用惊叹号或句号,句子用降调.
例如:
Be careful! 小心
Please open your books. 打开你的书。
Let me have a try. 让我试一试。
Don't open the door. 别开门。
扩展:把祈使句改为否定句只需在动词前加don't即可,表示要求或劝告某人不要做某事,后接动词原形。
例如:
Don't climb the tree. It's dangerous.
知识梳理2:祈使句
Open the door, please!
(1) 动词原形开头
→否定Don’t open the door,please!
分类:
Be quiet!
(2) Be+adj
→否定Don’t be quiet!
(3)以动词原形let开头
Let’s go home together!
No photos!/No fishing!
(4)No+n/v-ing
→否定Let’s not go home together!
沙场练兵
1.我们一起玩吧。_____________________
2.不要迟到。_______________________
1.Let’s play together.
2.Don't be late.
小练笔
1. Please look at the blackboard. (改为否定句)
答案: Please don’t look at the blackboard.
2.Close your eyes, Linda. (改为否定句,但意思不变)
______ _____ your eyes, Linda.
答案:Don’t open
3.on/walk/ the/ grass. (连词成句,并改为否定句)
答案:Don’t walk on the grass.
4.我们一起玩吧。(翻译成英文,用祈使句。)
答案:Let’s play together.
5.不要迟到。(翻译成英文,用祈使句。)
答案:Don’t be late.
句式互换:Don't ...与 You can't...
当我们用“Don't ...”来表示不允许的时候,我们也可以用 “You can't...”来替代。
即:Don't ...=You can't...
例如:Don't leave rubbish, Tom.
=You can't leave rubbish, Tom.
注:用don't 否定时,只能用其缩略式,而不能用do not.
例:Don't play football on the street. ( √ )
Do not play ootball on the street. ( × )
小练笔:
按要求改写句子
1. Play football in the classroom.(改为否定句)
______ play footabll in the classroom.
2. Play football in the classroom.(改为否定句)
_____ _______ play football in the classroom.
3. You can't pick flowers.(保持原句意思基本不变)
________ pick flowers.
here句型中的be动词变化
Here is water.
Look, here are four cars.
Here is a big family.
说明:在以here引导的句型中,be动词(is和are)根据可数名词的单、复数或不可数名词的变化而变化。
(1)如果时可数名词的单数,动词用is; 如果是可数名词的复数, 动词用are.
—Here is an umbrella.
—Here are some flowers.
(2)如果是不可数名词,动词用is.
—Here is a glass of milk.
Here is a mouse.
Here are many mice.
Change the words into plural form.
key boy family case backpack dictionary __
watch computer game notebook bag_______ alarm video tape hat pear egg apple
carrot vegetable star sock shirt shoe skirt sweater clerk store shop_________
1.在以here引导的句型中,be动词(is和are)根据可数名词的单复数或不可数名词的变化而变化。
2.Don‘t + 动词原形为否定祈使句,用来表达不让某人做某事,它的意思等同于:You can’t…(你不能……)。
3.用don't 否定时,只能用其缩略式,而不能用do not.
总结
thank you