八年级英语上Unit3教学设计

［教学过程］
重点词汇
allow bewarecontain equal form gather
get on with quest ice-cube iced matter milliliter
minus player plus point preparation punch shame
sound suitable turn into while

not only...but also
这个连词的意思是“不但…而且…，不仅…而且”，重点在后者。
代词人称不同时，动词随后面的代词。如：
Lu Xun is famous not only in China but also in all the world.
He speaks not only English but also French.
He not only said it but did it.
Not only he but also I am invited
not only …but also… 两个分句时态要一样，当not only置于句首，前一个分句要倒装。
Not only ______ to us the importance of doing the work but they also told us the best way to do it.
A. did they explain B. they explained
C. they explain D. had they explained

look forward to的用法
短语动词look forward to（doing）sth. 意为期待着（做）某事，其中的to是介词，而不是动词不定式符号。如：
Boys and girls are looking forward to Children’s Day.
孩子们渴盼着儿童节。
He's looking forward to hearing from his daughter.
他期待着女儿的来信。
含有look的短语动词还有look for（寻找），look after（照看，照顾，负责处理），look back on（回顾，回想），look into（了解，调查研究），look out（for）（当心，注意），look over z（翻阅，审校，检查），look round（回头望，查看）等。

时间状语从句
1. when引导的时间状语从句，常译为“当……的时候”，when的从句可以用延续性动词，也可以用点动词。
eg.
He was working at the table when I went in .
Someone knocked at the door when I was sleeping .
I will visit my good friend when I have time .
I worked for a foreign company when I was in Shanghai .
注：when也可以作并列连词，表示一个动词正在进行的时候，突然间发生了另外一件事。
eg.
I was fishing by the river , when someone called for help .
我正在河边钓鱼，就在那时有人求救。
We were working in the chemistry lab , when the lights went out .
我们正在化学实验室工作，突然灯都熄灭了。
2. while引导的时间状语从句，常译为“与……同时，在……期间”，while的从句中常用延续性动词或表示状态的词。
eg.
They rushed in while we were discussing problems .
Father was cleaning the car while I was playing computer games .
注：while也可以作并列连词，表转折的关系，相当于but，译为“然而”。
eg.
I like listening to music , while my brother likes doing sports .
3. as引导的时间状语从句，常译为“当……的时候，一边……一边”。as的从句中可使用延续性动词，也可使用点动词。
eg.
He sang as he was working . 他一边工作一边唱歌。
As time goes by , we have a better understanding of things around us .
随着时间的推移，我们对自己周围的事物有了更好的理解。
4. before和after引导的时间状语从句，before强调主句的动作发生在从句的动作之前，而after强调主句的动作发生在从句的动作之后。
eg.
He had been a cook before he went to college .
He called me after he had finished his work .
注：若主句和从句两个动作发生的先后顺序十分接近，那么也可以不用完成时态，例如上面的第二句可改成：
He called me after he finished his work .
5. as soon as引导的时间状语从句，译为“一……就……”。
eg.
He will go to see you as soon as he gets here .
She got everything ready as soon as she got to school .
6. since引导的时间状语从句，译为“自从……”，主句常用现在完成时，从句常用一般过去时。
eg.
We have made many dumplings since we began to cook .
We haven’t seen each other since we parted .
注：常用句型：It is +时间段+since从句 译为：自从……有多长时间了。
eg.
It is six years since she graduated from the university .
7. till和until引导的时间状语从句，译为“直到……为止”，not … till / until引导的时间状语从句，译为“直到……才”。前者强调主句动作的结束，用延续性动词，后者强调主句动作的开始，用点动词。
eg.
I will wait for my friend until / till he comes .
We won’t start our discussion until / till he comes .

either…or 与 neither…nor用法上的区别
either…or…表示两种可能性中任选一种，其后面必须连接两个相同的句子成份。例如：
The sentence can be either true or false.句子要么是对的要么是错的。
You can either come with me or walk home.
你要么跟我一块去，要么走回家去。
Either mum or I cook supper.要么我母亲要么我做晚饭。
neither…nor…连接两个相同的句子成分，表示否定的意思。动词的单复数形式与nor后的单词主谓语相一致。例如：
Neither Li Lei nor Wang Hai was there.李雷和王海都不在那里。
I neither watch TV nor listen to the radio.我既不看电视也不听收音机。

系动词亦称连系动词（Link Verb），作为系动词，它本身有词义，但不能单独用作谓语，后边必须跟表语（亦称补语），构成系表结构说明主语的状况、性质、特征等情况。
说明：有些系动词又是实义动词，该动词表达实义时，有词义，可单独作谓语，例如：
He fell ill yesterday.　
他昨天病了。（fell是系动词，后跟补足语，说
生词表: