2021-2022学年牛津深圳版八年级英语下册Unit7 The unknown world.-grammar教案

Unit 7 The unknown world
【教学内容】
Grammar and More practice
【课时安排】
4课时
【第三课时】
【教学目标】
1．Train students' reading skills—read more practice by using skimming and scanning skill.
2．Master the usage of Adverbial clauses of reason by doing exercises.
【教学重点】
1．Learn some language points in More practice.
2．Teach students the grammar.
【教学难点】
Expand students' horizons—know more about the unknown world.
【教学准备】
PPT, Blackboard
【教学过程】
I. Grammar
1．Warming up
Look at pictures and answer: What are they talking about
2．Guided students to answer questions: When we use adverbial clauses of reason We usually use because, as and since to start adverbial clauses of reason.
3．Make dialogues according to the pictures using because, as and since. The teacher explains the usage.
4．Presentation
Then use adverbial clauses of reason to complete the police office's notes.
5．Ask students to finish the exercises and pay attention to the differences between because and because of.
II. More practice
1．Warm up
Talk about pictures about the UFO.
2．Read the passage, and answer the questions. Work in pairs to talk with partners and work out the answers.
3．Read for the second time, and find the main clues.
4．Read for the third time and fill in the blanks.
5．Learn about culture corner and discuss the science fiction with your partner.
【练习讲解】
Step 1复习检查
I用as, since, because, because of, for填空.
They didn’t go to the museum yesterday ______________ the rain.
He was punished _______________ breaking the law.
Many people like pandas ______________ they are cute.
Mary missed the train ____________ she arrived late.
It will rain, _________ the sky is dark.
___________ we live near the river, we can often go swimming in summer.
--Why do you like English -- ___________ it’s so interesting.
_________ a good teacher, he worked very hard.
_________ the heavy rain, we had to stay inside.
___________ you feel ill, you’d better stay in bed.
because of 2. because of 3. because 4. because 5. for
Since/As 7. Because 8. As 9. Because of 10. Since
II完成句子.
既然你认为你是对的，那你为什么不坚持呢
_______ ________ ________ _______ ________, why don’t you hold on to it
我喜欢数学，因为我认为它非常有用并且重要。
I like math ________ I think it’s very _________ and _________.
由于你离开了，我们不得不取消这次活动。
_________ ________ _________, we had to call of the activity.
你应该穿上你的外套，因为外面冷。
You should ________ _________ your coat ___________ it is cold outside.
既然你累了，你可休息一下。
__________ you are tired, you may ________ _______ ________.
由于雨下得很大，所以我们没有去游泳。
__________ it was raining _________, we didn’t go swimming.
因为她生病了，所以她没有去上学。
She didn’t go to school __________ _________ her illness.
这个男孩没有完成作业是因为他太懒了。
The boy didn’t finish his homework ________ _______ ______ too lazy.
既然你回答不出这个问题，我就问别人了。
__________ you can’t answer the question, I’ll ask someone _________.
她小声地说话，因为不想吵醒孩子。
She spoke _________ __________ she did not want to wake up the baby.
Since you think you’re right
because; useful; important
As you left
put on; because
Since; have a rest
As; hard/heavily
because of
because he was
Since, else
quietly; because
Step 2 精讲精练
状语从句
1．时间状语从句
用表示时间的连词连接一个句子作状语，这样的主从复合句就是时间状语从句。使用时间状语从旬时要注意：
如果主句是一般将来时，从句只能用一般现在时表示将来意义。常用引导词：when,while，before， after,until，since
I will go to see you when I come back．我一回来就去看你。
Some were swimming while others were talking．一些人在游泳，其他人在说话。
The sky was very dark before the sun came out．太阳出来之前，天空很黑。
After they got married，they moved to the countryside．结婚后，他们搬到了乡村。
He didn't go to bed until his mother came back．他妈妈回来后他才上床睡觉。
It is two years since he left．他离开两年了。
2．条件状语从旬
由连接词if或unless引导的状语从旬叫做条件状语从句。注意条件状语从旬的“主将从现”(在含有条件状语从旬的复合句中，表示将来时态，主句是一般将来时态。从旬要用一般现在时)o
We will go Out to play if it doesn't rain．如果不下雨。我们就出去玩。
Unless it rains，the game will be played．如果不下雨，游戏将进行。
3．比较状语从句
比较状语从句通常由as或than引起，这类从旬和大多数状语从旬不同。它们不修饰动词，而是修饰as。so，less，more等副词，或其他比较级的词。如taller。harder。
He knows as much as I do about computers．他在电脑方面了解的和我一样多。
He is taller than his sister．他比他妹妹高。
4．目的状语从句
目的状语从句的从句部分是用于补充说明主旬中谓语动词发生的目的。表示目的状语的从句可以由SO that，in
order that等引导o SO that=in order that/ to
Say it louder so that everyone can hear you．一Say it louder in order that everyone can hear you．
大声说，以便大家都能听到你。
5．结果状语从旬
结果状语从句的从句部分是补充说明主旬中谓语动词发生的结果的，通常位于主旬之后。结果状语从句常由
So…that或such…that引导。so+形容词+a／an+名词=such+a／an+形容词+名词。
He is so strong that he can carry the heavy bag．他足够强壮，能够扛起这个重包。
she is such a kind girl that everyone likes her．=She is so kind a girl that everyone likes her．
她很善良，每个人都喜欢她。
6．让步状语从旬
让步状语从旬一般翻译为“尽管……”或“即使……”。引导让步状语从句的连词主要有：though, although, even though
though／although不可与but连用。
Although he is very old，he is quite strong．他虽然年纪大了，身体还很健壮。
We'11 leave even though the weather is bad．即使天气不好，我们也要离开。
7．原因状语从句
原因状语从句表原因，主要由because，since来引导。because不能和so连用。
l can't get to sleep because it is noisy outside．由于外面声音嘈杂我睡不着。