词汇点睛
一、基础词汇
1.宇航员 2.公寓 3.火箭
4.太空站 5.甚至 6.仆人
7.危险的 8.已经 9.工厂
10.简单的 11.相信 12.不同意
13.落下 14.可能 15.不可能
16.一方 17.或许,大概 18.假期
19.在…期间
二、重点词汇讲解。
1.even
(1)even为副词“甚至,更”，后面可接形容词的比较级。
Eg: Bob is very tall, Tom is even taller than Bob.
(2)even还可和“if”连用构成词组“even if”,相当于“even though”意为“即使”。
Eg: We’ll go even if he doesn’t come.
2.dangerous
dangerous为形容词“危险的”，其名词形式是danger,构成词组“in danger”在危险中，“out of danger”脱险。
Eg: Tigers are dangerous animals.
The doctor said that his father was out of danger.
3.already
already为副词“已经”，通常用于现在完成时放在肯定句里，否定句和疑问句中要用yet.
Eg: A: Have you finished your work yet?
B: Yes, I have finished already.
4.hundreda of
(1)hundreds of意为“成百上千的，数百的”。
Eg: There are hundred of boks in the library.
(2)hundred(百)，thousand(千)，million(百万)等词前有具体数字时，其本身用单数形式，直接修饰名词，但“hundred”等词可以和“many, several, some”等表示不定数目的词连用并在后面接“of+复数名词”。
Eg: There are two hundred birds in the tree.
She has several hundreds of camps.
5.fall
fall为动词“落下,跌落”，其过去式、过去分词分别为fell,fallen。常构成词组fall behind“落后”，fall off“从…掉下来”，fall asleep“入睡”。
Eg: Study hard, or you’ll fall behind others.
He fell off his bike and hurt his leg.
6.look for
look for意为“寻找”，强调寻找的过程，“find”强调寻找的结果，其宾语常为表示人或物的名词或代词，“find out”强调发现的结果，宾语常指某种现象、结论或某个问题的答案。
Eg: I’m looking for my pen, but I can’t find it.
Who found out the answer to this ques tion.
7.be able to
(1)be able to do sth有能力干某事，会干某事。
Eg: I’m able to swim.
(2)be able to和can的区别：
第一，can只能用于现在时和过去时态中，而be able to有多种时态;第二，be able to可用于不定式结构，而can不能;第三，表示猜测时，只能用can,不用be able to;第四，can无人称和数的变化，而be able to有。
Eg: People will be able to fly to the moon on vacation.
Ann can’t ride a bike, but we are able to do it.
8. probably
(1)probably为副词“或许，大概”，常位于行为动词之前，助动词、情态动词或系动词之后。
Eg: You are probably right.
(2)maybe, perhaps也为“也许”，一般放在句首。
Eg: Maybe/Perhaps he is a policeman.
(3)may也许，放在谓语动词之前。
Eg: He may be a doctor.
9.keep
(1)keep动词“保持”、“饲养”
Eg: Keep the classroom clean
keep a dog.
(2)keep可构成词组keep sb doing sth,让某人一直干某事，keep (on) doing sth一直不断做某事。
Eg: Sorry, I kept you waiting for me for a long time.
The little girl kept reading all the time.
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