2） 在动词不定式结构中的“not only …but also…”译作“不但……而且”，是并列连词。连接两个“to say”的宾语从句。
3） 句中出现了短语“be likely to do sth.”，译为“可能做（某事）”如：He is likely to come back.他很可能会来。
I’m likely to be free tomorrow.明天我可能有空。
4） 短语“in the next day or two ”译为“一两天后”常用于将来时。
3．There is a rocket motor on the satellite by which the direction of the satellite can be changed if necessary. 在卫星上还有一个火箭马达，必要时可以用它来改变卫星的方向。
if necessary. … if it is necessary. “必要时”
在when/where/while/whether/how等引导的时间、地点、条件、方式或让步等从句中，若主语是it或与主句的主语相同，有时可将主语省略。谓语一部分（特别是动词be）常常可以省略。
He listened to the radio while doing his homework. （while he was doing his homework）他边做作业边听收音机。
Whenever in difficulty（= Whenever you are in difficulty）， you can come to mefor help. 无论什么时候你遇到困难，都可以来找我帮忙。
Do not leave the machine till told to do so（= till you are told to do so）。
不要离开这台机器，直到叫你离开你才可以走。
Talking about what to do today/tomorrow1）提出建议
What shall we do today？ 我们今天干什么？
Where shall we go today？我们今天上哪儿去？
Shall we go to the Science Museum tomorrow？明天我们去科学博物馆，好吗？
What/How about going to the zoo？到动物园去怎么样？
Let’s go to the cinema， shall we？ 我们去看电影，好吗？
Why don’t we go picnicking today？我们干嘛不去野餐呢？
2）询问对方的意见
What would you like to do today？今天你想干什么呢？
What do you feel like doing today？今天你想要做什么？
What do you plan to do today？你今天打算做什么？
Have you decided what to do/where to go today？你决定好了今天干什么/到哪儿去吗？
3）表明自己的打算或想法
I fell like taking a walk in the woods.我想到树林中去散步。
I’d rather go to see the Great Wall today.我想今天去游长城。
I’d rather not go anywhere today.今天我哪儿也不想去。
I would like to see a film tomorrow.我想明天去看电影。
I have decided to go mountain-climbing tomorrow. 我已决定明天去爬山。
复习“介词＋关系代词”结构
技巧：
“介词＋关系代词（whom， which）”引导定语从句的现象很普通，但也较复杂。现将其要点分析如下：
（1）“介词＋关系代词”结构既可引导限制性定语从句，也可引导非限制性定语从句。
例如：
There is a rocket motor by which the direction of the satellite can be changed.（限制性定语从句）
卫星上装有可能改变其运行方向的火箭发动机。
The factory has 3， 000 workers， of whom about 1， 000 are women. （非限制性定语从句）
这个工厂有三千工人，其中大约一千是女工。
（2）“介词＋关系代词”结构中的介词可以是in， on， about， from， with， to， at， against， through， by means of， because of等，关系代词只能用whom， which，不能用that。例如：
Water boils at 100°C ，at which temperature it changes to gas.水在100度沸腾，变成蒸气。
（3）“介词＋关系代词”结构中介词的选用需按句意或词的搭配关系而定。例如：He is the man for whom I enjoy working. 他是那种我愿意为他工作的人。
（whom 前用for是根据句意“为……而”而决定的）
He is the man with whom I enjoy working. 他是那种我喜欢和他一块工作的人。
（whom前用with是根据句意“和……一起”而决定的）
注意：两个或三个词构成的固定短语动词，如listen to， book at， look after， look for， depend on， take care of， pay attention to等，在定语从句中一般不宜将介词分开放在关系代词之前。例如：
These are the children whom she will take care of. 这些是她要照料的孩子们。
（不说…of whom she will take care）
Is this the book which you are looking for？ 这是你要找的书吗？
（不说…for which you are looking）
（4）“介词＋关系代词”结构在定语从句中可以作定语和状语，偶尔也作表语。例如：
①作定语
The factory has 3，000 workers， of whom about 1，000 are women. （提示of whom修饰3，000 workers）
China has hundreds of islands， the largest of which is Taiwan. （提示of which修饰the largest，即 the largest island）
②作状语
The room in which she works is kept in good order. （in which 修饰works）
They are the girls with whom I go to school every day. （with whom 修饰go toschool）
③作表语
Present at the conference were many important people， among whom was the President.出席会议的有许多大人物，其中就有总统。 （among whom was the President） 倒装语序的定语从句，主语是President， among whom起表语作用）
（5）在“介词＋关系代词”结构中，which可单独作定语，而whom则不能。例如：I called her by the wrong name， for which I apologize. 我把她名字叫错了，为此我道了歉。
（which修饰mistake）
（6）“介词＋关系代词”后接不定式短语相当于一个宾语从句。
Tom is a pleasant young man with whom to work.=Tom is a pleasant young manto work with.
汤姆是个能一块工作的快乐的小伙子。
I have no money with which to buy a car.=I have no money to buy a car with.
我没钱买车。
但以上两句不可分别写为：
Tom is a pleasant young man whom to work with. （×）
I have no money which to buy a car with. （×）
Lesson 53Step I Lead in1.Teacher ask some questions before the class， for example：Can anybody tell me what museums you have been to and what wonderful thingsyou see there？ then ask visitor the following questions1） What museums did you ever visit？
2） What did you see there？
3） What gave
you the deepest impression？
4） What kind of museums do you prefer？ Why？
5） Do you think that visiting museums is a good way for you to learn something new？ Whydo you think so？
2.The T introduces some museum names：History Museum； Science Museum； Art Gallery； Natural History Museum； Military Museum， etc.Step II Watch the videoAfter that，The T give Ss questions to answer：1） Where did the conversation take place？
2） What was the weather like that day？
3）Which museum did they finally decide to visit？
Key： 1） The conversation took place in London.
2） It was probably raining that day.
3） They finally decided to visit the Science Museum.
Step III Listen
The T gives Ss to listen the dialogue twice According to the dialogue， The Tsets a few question to check up. for example1）If you want to visit the Natural History Museum in London at present， do you have to pay for it？
2） What is on at the Science Museum this month？
3） Why does Zhou Lan want to see the exhibition too？
Key： 1） You have to pay to get in if you want to visit the Natural History Museum in London at present. In the past it was free.
2） A special exhibition is on at the Science Museum this month. It’s about space and satellites.
3） Becauseshe is planning to do a special study of satellites next term and she wants to findout some useful information.Step IV Langue pointsthe T explains some important phases and expressions1） feel like （doing）
Do you feel like a cup of tea？
2） as/so far as
I will help you as far as I cart.
We did not go so （as） far as the bridge.
3.summary the expressionsStep V Oral practiceThe T gives some sentence s to make up a dialogue， then The T asks Ss to repair it a few minutes ， after that ask them to play a role in front of the class.