Madame Curie
(1)be used as与be used for，be used to sth．／doing sth，be used to do sth.的区别：
be used as和be used for都意为"用作"，不同的是as后通常接名词，for后多接v．-ing；be used to sth．／doing sth．意为"习惯于某事／做某事"，to在这里是介词；be used to do sth．意为"被用于做某事"；used to do 意为"过去常常做某事"，used to这里是助动词：e.g.
①During the war the castle was used as a prison．战争期间城堡用来作监狱。
②During the war the castle was used for keeping prisoners in．战争期间城堡用来监禁囚犯。
③I'm used to the noise．我对这噪音已经习惯了。
④I'm not used to getting up early．我不习惯于早起。
⑤Wind can be used to produce electricity·风可以用来发电。
⑥This river used to be clean．这条河以前是干净的。
(2)a cure for...与cure sb.of...的区别：
a cure for...意为"对…的治疗"，cure这里作名词；"cure sb. of"意为"治好或治愈某人的...病"，cure这里作及物动词。e．g.
①This is a certain cure for your laziness．这是治懒惰的特效药
②Moving to the country cured her of asthma．搬到乡下她的哮喘就好了。
be admired as与be admired for的区别：
（1）be admired as意为"被当作……为人们所钦佩"，as是介词，意为"作为"。
（2）be admired for意为"因(某种原因)而为人们所钦佩"，for是介词，表示原因。e．g．
He is really admired for his frankness．他以他的坦诚实在为人们所钦佩。
pay off与pay for，pay，pay...for...的区别：
pay off + debt指"还清"债款
pay for sth．指"对(某物)的款"
pay sb．some money意为．"付给某人(多少)钱"。
pay sb．／money for sth．意为"付给(某人款／钱买某物)"。 e．g.
①She tried to leave the shop without paying for the dress．她企图买衣服不付款就离开商店。
②He paid the servant 5 dollars to wash his car．他付给佣人五元钱叫他洗车。
③He paid her for the work．他付给她工钱。
④I paid ￡200 for the painting.这幅画我花了二百英镑。
⑤Did you pay him l00 dollars for that old bike你付给他那辆旧自行车了吗?
语法教学：
复习定语从句
定语从句分为限定性定语从句和非限定性定语从句。
1) 限定性定语从句：限定性定语从句对所修饰的先行词起限定作用。 限定性定语从句中关系词的使用列表如下：
在句中的作用关系词说明
主语 关系代词：who/that(指人) which/that(指物 关系代词不能省略
宾语 who／whom／that(指人)
which／that(指物) 关系代词在非正式
文体中可以省略
定语 whose 名词前表所有关系
介词+关系代词 whom(指人) which(指物) 关系代词不能用who或that
whose(定语) 名词前表所有关系
状语 关系副词：when(时间) where(地点)why(原因) 先行词为表时间、
地点等的名词
例：
①Anna was an American writer who／that interviewed Mao Ze dong in Ya'an．(指人作主语)
安娜是一位当年曾在延安采访毛泽东的美国作家。
②The friends whom／who／that we met in the park were from Egypt．(指人作宾语)
我们在公园里遇见的朋友来自埃及。
③A taxi is a car (that/which)you can hire．(指物作宾语) 出租车是你可以租用的小汽车。
④Many forests where the animals lived were destroyed．(作状语)
动物栖息生活的许多森林遭到破坏。
⑤We ought to help those families whose men are in the army．(作定语)
我们应该帮助那些男人在部队的家庭。
⑥He looked at the box from which the voice came．(介词+关系代词)
他看着那只传出声音的方箱子。
2)非限定性定语从句：非限定性．定语从句对所修饰的先行词(句子)起补充说明的作用，不起限定作用。从句中使用关系代词who，whom，which，whose和关系副词when，where等，不使用关系代词that，作宾语的whom不能用who代替。
例：They visited the city of Hangzhou，which is famous for its beautiful scene．他们参观了杭州城，它以风景秀丽而闻名。
非限定性从句中关系词指代整个句子时，用关系代词which。试比较：
①Big floods hit some parts of China in the summer of 1998,which caused a great damage to the country．1998年夏中国部分地区遭受特大洪灾，给国家带来了巨大损失。(指代整个句子)
②They got married on July 1，1997，when Hong Kong returned to our motherland．他们于1997年7月1日喜结良缘，香港在这一天回归祖国。(指代时间作状语)
学习中应注意的问题(一)
1)先行词为表示时间或地点的名词在从句中作主语或宾语时关系词的使用。当先行词为表示时间或地点的名词时，在从句中作主语或宾语时，应使用代词which或that，不能用副词when或where．
①a：I'll never forget the days which/that I spent in the country．(which作spent的宾语)
b：I'll never forget the days when I worked in the country．(when代替in the days作状语)
②a：They came to the small village，which was hundreds of miles from the city．(which在从句中作主语)
他们来到这个小村，小村与城市相距几百英里。
b：They came to the small village，where not more than l00 villagers lived．(where代替in the village作状语)他们来到这个小村庄，那里的村民不超过一百人。
2)the time，the way等为先行词时关系词的使用。
(1)先行词为time／moment等表示时间的名词时，用关系词when，that均可，且可省略。
例：By the time (when／that) they arrived，the house had been destroyed completely．等他们到达时，房子已完全烧毁了。
(2)the way用作先行词，关系代词作介词in的宾语时，通常介词与关系代词可以同时省略；如不使用"in"，则不能用关系代词。
例：He hated the ways(which／that)she talked (in)．他不喜欢她说话的方式。
3)关系代词只使用that，不使用which的情况。
(1) 关系代词前有形容词的最高级修饰时。
This is the funniest drama that I have seen.这是我看过的最滑稽的剧。
(2)先行词为不定代词。如：all，everything，nothing，anything，both．either，much，little，none。
例：①Everything that was taught in class seemed easy for him. 对他来说课堂上教的一切似乎很容易。
(3)先行词为only，very等词修饰肘。
例：①It was the only textbook that could be found．这是能够找到的仅有的一本课本。
②This is the very dictionary that I want to get．这正是我想得到的词典。
(4)定语从句中固定短语动词和短语中的介词不能前置。
例：It was the maths book that the boy was in search of．这是这个男孩正在寻找的数学书。
5)whose与of which/whom
(1)都可表所有关系。
(2)of which/whom还可表示"其中的……"(整体的部分)
例：He told us many stories about Long March，of which this is a good example.他给我们讲了许多关于长征的故事，这是其中一个很好的例子。
as和which引导的非限制性定语从句比较:
下面是近年高考题中关于定语从句的试题
1.The result of the experiment was very good, ____ we hadn't expected． (NMET2000，10)
2.Dorothy was always speaking highly of her role in the play，____,of course，made the others unhappy.
(NMET2000，17)
A.when B.which C.this D.what
3．Carol said the work would be done by October,____ personally I doubt very much．(NMET99，19)
A.it B.that C.then D.which
4.The weather turned out to be very good,____ was more than we could expect. (NMET94,39)
A.what B.which C.that D.it
它们的答案分别是C、B、D和B，都是用which引导一个非限制性定语从句，which代替逗号前整个主句的内容。
但有时关系代词as也可引导非限制性定语从句，as也是代替整个主句的意思。如:
As we all know，he never smokes. The foolish boy made the mistake again，as could be expected. ____ is mentioned above，the number of students in senior high school is increasing．('99上海，4)
A.Which B.As C.That D.It
关系代词as和which引导的非限制性定语从句区别究竟在哪里呢?
1．非限制性定语从句位于句末，而且as或which在从句中作主语、宾语或表语时可互换。如:
He is a farmer as/which is clear from his manners．(在从句中作主语)
This elephant is like a snake，as／which anybody can see．(在从句中作宾语)
2. which引导的非限制性定语从句一般放在句末，而as引导的非限制性定语从句可放在句末，也可放在句中、句首。置于句首时，不能用which替换。如：
Crusoe lost his dog, which made him very sad.
Taiwan is part of China, as/which is known to all.
As we have see
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