9B Unit 4 第一讲【单词拓展】【知识点解析】1.Wow, I've never thought about travelling into space.think about，考虑。
about是介词，后可接名词、代词或动名词，作宾语；也可以接疑问词＋不定式结构或宾语从句。
表示“你认为怎么样” ，what do you think of=what do you think about=how do you like =How do you find 后可接名词代词或动名词。
拓展：你认为他的想法怎么样？How do you like / What do you think of /about idea?●think over，思考；考虑。
over是副词，如果代词作其宾语，则要将代词放在think 和over中间。
考虑一下，你就能找到办法。
2.Me neither.me neither，在此处neither副词，意思是也不, 也不是。
①常用于neither+助动词/情态动词/连系动词be＋主语结构，表示前面所说的否定情况同样适用于后面的人或事物，意思是某人/某物也不。
Mary can't swim. Neither can I.You didn't go to the park yesterday. Neither did Tom.②Neither可以作形容词，与单数名词连用，“两者都不”Neither answer is correct.两个答案都不对。
③Neither可以作代词，“两者都不”, 是both的反义词。
Neither of my friends has come yet. 我的两个朋友都没来。
拓展：Neither /nor和so 引导的倒装结构中的助动词/情态动词/连系动词be，应与前句的谓语部分，以及后面的主语，在人称和数上保持一致，时态和前句保持一致。
如果前面的句子是肯定句，一般用So＋助动词/情态动词/连系动词be+主语结构，表示前面所说的肯定情况，也同样适用于后面的人或事物，意思是某人物也一样。
They went to the zoo yesterday. So did we.They have been to shanghai. So has he.Neither of my friends has come yet.④Neither用作连词，常和nor 连用。
Neith er… nor…既不…也不，连接两个平行结构。
如果连接两个并列主语，谓语动词要遵循就近原则。
I can speak neither English nor Japanese.Neither he nor I have been to Beijing.3.What would it be like to live on Mars?What’s sb. like ? 意思是某人如何, 用于询问某人的性格品质等。
What does sb. like? 指某人喜欢什，用于询问某人的喜好.What does sb. look like ? 是某人长什么样，用于询问某人的外貌.翻译：What is mother like?What does she like?What does your sister look like?Can you tell me _________in the future?A how life will be likeB how will life will be likeC what life will be likeD what will life be like4.Some people believe that humans could live on the planet Mars by the year 2100.believe通常不用于进行时态，名词形式是belief.5.Our own planet, the Earth, is becoming more and more crowded and polluted because of therapid increase in population.(1)more and more crowded, 越来越拥挤，其结构是比较级＋and＋比较级，意为越来越……。
(2)polluted是形容词，意思是被污染的。
动词形式是pollute. 意思是污染。
名词形式是pollution，意思是污染, 污染物。
(3)rapid是形容词，意思是快的, 迅速的，副词形式是rapidly。
He made rapid progress in English.Our country is developing so rapidly that we can imagine what life in the future will be like.（4）increase.作及物动词。
意思是，增，增长。
后可跟名词。
也可作不及物动词。
increase to意思是，增加到。
increase by 增加了.The population of this city will increase to 1.1million.They have increased the price of the vegetables by ten percent.6.Here is what life there could be like.●完全倒装，又称为全部倒装，是指将句子中的谓语全部置于主语之前。
即Here位于句首，主语是名词时，用Here+谓语+主语结构。
此结构通常只用于一般现在时和一般过去式。
Then began a bit wall between the two countries.于是两国之间开始了恶战。
●部分倒装又称半倒装，是指将谓语的一部分，如助动词或情态动词，提至主语之前，而谓语动词无变化。
如果句中的谓语没有助动词或情态动词，主要需添加助动词do/ does/ did。
并将其置于主语之前。
Jim likes English. So does his brother.7.At present, our spacecraft are too slow to carry large numbers of passengers to Mars--it wouldtake months.●large numbers of表示许多, 大量的。
= a large number of. Number.前面可以加large or small等修士，以表示程度。
●the number of是……的数量。
后跟可数名词复数，作主语时，谓语动词一般用单数。
我们班学生的数量是50。
这本书有60页。
8.With the development of technology, by the year 2100, the journey might only take about 20minutes in spacecraft that travel at the speed of light!（1）Development.意思是，发育、成长、发展，进展是名词。
the development of………的发展/成长●Develop.是动词，意思是发展开发，生长发育。
●动词＋后缀，变成名词。
agree agreementimprove improvement,move movementdevelopdevelopmentdevelopingdeveloped(2) Journey: 长途陆路拓展：trip：短途短期tour :观光游玩travel:时长路远.（3）at the speed of 以……速度at the price of 以……价格at a high price高价at a low cost低成本.at full / high speed以全速高速,at ten degree centigrade 在十摄氏度.9.However, the spacecraft would travel so fast that the journey to Mars might be quiteuncomfortable. Many people would feel ill.（1）So……that……如此, 以至于，that引导结果状语从句。
So是副词，常用来修饰形容词或副词。
这个男孩跑得如此快，以至于我赶不上他.他气得说不出来一句话。
注意：当名词前有Many、much、few、little 等词修饰时，只能用so …that...（2）uncomfortable, 形容词, 不舒适的。
其中un是否定前缀，其反义词为舒适的，含否定前缀的单词，有unlucky, unknown, untidy, unusual, unfriendly, incorrect, impatient, impolite imperfect, illegal, irregular。
（3）陈述句中如果含有否定意义前缀或后缀单词，整个句子仍视为肯定。
其反意疑问句，遵循前肯后否的原则。
Your younger brother felt unhappy, didn’t he你弟弟不高兴不是吗？11.Moreover, scientists are not sure whether plants could grow on Mars.（1）be sure＋宾语从句，意思是确信，表示主句主语对宾语从句中所涉及的事物作出的判断。
sure.反义词是unsure ，副词形式是surely.We are not sure if he will make progress.This term. I’m sure that you are right.（2）be sure to do sth.必然会做某事。
be sure to do.用于祈使句中，不表示判断，而表示对对方的要求，意思是务必要一定要。
千万不要忘记（3）Be sure of /be sure about 确信，对……有把握。
12.Food would most probably be in the form of pills and would not be so tasty.(1)in the form of.以……的形式，为固定短语。
他以故事的形式把他的过去讲给我们听。
(2)tasty形容词，美味的，可口的。
13.Gravity could be another problem.（1）problem.多指有待解决的问题，特别是疑难问题，或令人疑惑的是人或情况。