三、 学习中应注意的问题
1、 复合名词变复数的规则：
(1)将复合名词里面所包含的主体名词变为复数。
例：son(s)inlaw 女婿
looker(s)on 旁观者
passer(s)by 过路人
filmgoer(s)常看电影的人
toothbrush(es)牙刷
35yearold worker(s)35岁的工人
grandchild(ren)孙儿
armyman(armymen)军人，但grownup(s) 例外。
(2)复合名词里面找不到主体名词时，只在词末加复数词尾。
例：gobetween(s)中间人 drawback(s)缺陷
(3)由man和woman构成的合成词，里面所含的成份全部要变为复数。
mandoctor(mendoctors) 男医生
womanworker(womenworkers) 女工人
(4)由boy和girl构成的合成词，只在后面名词上加复数词尾
boystudent(boystudents) 男生
girlstudent(girlstudents) 女生
2 、定语从句中只用that不用which的情况
定语从句中which与that在一般情况下可以互换使用， 但在下列情况之下，通常只用that(有时可省略)。
(1)先行词为all,everything,nothing,anything,little,few,much等不定代词时
例：I’m sure there is nothing that a woman can’t do. 我相信没有女人做不了的事。
(2)先行词被all,every,each,few,no,some等词修饰时
例：There are some jobs that men can’t do very well. 有些工作男人无法做好。
(3)先行词被序数词或形容词最高级修饰时
例：That’s the best book that I’ve ever read. 那是我所读的书中最好的一本。
(4)先行词受到the only,the very,the same,the last 等词修饰时
例：Corn was not the only food that was taken to Europe. 玉米并不是唯一的一种被带往欧洲的食物。
(5)先行词中既有人又有物时
例：We were talking about the things and people we remembered in school. 我们当时正在讨论我们记得的在学校里发生的人和事。
(6)当主句是以who或which开头的疑问句时
例：Who is the man that was invited to the ball? 受邀请参加那次舞会的人是谁?
3 、在学习不定式作目的状语时，我们应注意，不定式短语通常可用so that引导的目的状语从句互换。
例：The doctor asked him to remove his trousers so that he could examine his legs.
The doctor asked him to remove his trousers in order to (so as to)examine his legs. 医生请他把长裤脱了，以便检查他的双腿。
4 、在it seems that/as if...句型中， seems 常可以由looks, appears替换，looks后常接as if... 从句；appear之后常接that...从句。
例：①It looks as if it is going to rain. 天看上去似乎要下雨了。
②It seemed(looked)as if the fisherman would have nothing to take home that morning. 那天上午，渔夫似乎没有什么东西能带回家。
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