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⒂ sick与ill区别：sick和ill都表示“生病的”,但是,sick可以做定语、表语,而ill只能做表语。如：He has been ill/sick for a long time and he is very weak now.(他病了很久,现在非常虚弱) / Vets help treat sick pets and most of the pets’ owners like them.(兽医帮助诊治患病的宠物,
很受宠物主人们的喜爱)
⒃ the poor(穷人们) / the rich(富人们)等用法：“the+形容词”这一结构可以表示一类人物,复数含义。
如：We must try our best to help the poor.(我们应该尽力帮助穷人们)
/ The rich never know how the poor are living.(有钱人哪知穷人怎么过日子)
二、副词：用来说明事情发生的时间、地点、原因、方式等含义或说明其它形容词或副词程度的词叫做副词。
1、副词在句子中的位置以及作用：
⑴作状语：
① 时间副词：一般放在句首或句尾,注意,early、late、before、later、yet等一般放在句尾,
already、just一般放在动词的前面。如：We will visit the Great Wall tomorrow.(我们明天要去参观长城) / They have already been to the UK twice.(他们去过英王国两次) /
Soon the lost boy found his way back home.(不久迷路的孩子找到了回家的路)
② 频度副词：一般放在be动词之后或者助动词与主要动词之间,但sometimes、often等
还可以放在句首或句尾,usually可放在句首,once可放在句尾,twice、three times等一般放在句尾。如：Sometimes I get up early.(我有时起得早)/ The workers usually have lunch at the factory.
(工人们通常在厂里吃午饭) / Take this medicine twice a day.(这种药一天吃两次)
③ 方式副词：一般放在行为动之后,suddenly可以放在句首、句尾或动词之前。如：Old people can hardly walk as quickly as young people.(老年人几乎不可能走得和年轻人一样快) / Suddenly he saw a light in the dark cave(山洞).(突然,在黑黢黢的山洞里,他看见了一丝亮光)
④ 地点副词：一般放在句尾,但here、there还可放在句首。如：There you can see thousands of bikes running in all directions(方向).
(在那里,你可以看到成千上万的自行车朝各个方向流动) / The frightened wolf ran away.
(受到惊吓的狼逃开了)/ He walked out quietly and turned back soon.(他悄悄地走了出去,很快又返回)
⑤ 程度副词：修饰动词时,放在动词之前;修饰形容词或副词时,放在形容词或副词之前。
但注意,enough总是放在被修饰的形容词或动词的后面;only位置比较灵活,总是放在被修饰的词的前面。如：I nearly forgot all about it if he did not tell me again.(如果他不再次告诉我,我几乎把那事全忘了) / It was so strange that I could hardly believe my ears.(它那么奇怪一直我都不能相信我的耳朵) / She got to the station early enough to catch the first bus.(她早早地赶到车站赶上了首班车)
⑥ 疑问副词：用于对句子的状语进行提问,位置总是在句首。如：When and where were you born?
(你何时何地出生?)/ Why did little Edison sit on some eggs?(小爱迪生为什么要坐在鸡蛋上?)/
How do you do?(你好!)
⑦ 连接副词：用来引导主语从句、宾语从句和表语从句,在从句中作状语。
How I am going to kill the cat is still a question.(我打算怎样杀死那只猫还是个问题)/ That is why everyone is afraid of the tiger.(那就是人人都害怕老虎的原因) / He wondered how he could do it the next day.(他不知道第二天怎样做那事)
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