1. think/ think/about/ think of
(1) think 单独使用时表示思考, 接that 宾语从句时意为认为,觉得。
I am thinking how to work out the problem.
I think she is a good student.
当宾语从句含有否定概念时,通常形式上否定think ,但意义上却是否定宾语从句。
I dont think he can come.
I dont think it will be windy.
(2)think about 可接一个名词,动词-ing 形式或由疑问词引导的不定式或宾语从句,意思是考虑。
I have thought about it for a long time.
Please think about how to tell her the bad news.
(3)think of 表示认为, 一般用于疑问句中,与what 连用。
What do you think of the TV play? = How do you like the TV play?
2. big/ large/ great
上述形容词都表示大,但侧重点及程度不同。
(1) big指具体事物的大小,强调比正常形体的标准大,既可用在普通场合,也可用在正式场合。它可用来指人的身材高大或长大了,还可表示伟大,重要之意。如:
Can you lift up this big stone?
On the last day I made a big decision.
(2) large特别强调远远超过标准的大,指体积、面积、容积、数量之大。如:
A whale is a large animal.
A large crowd collected at the gate of the theatre.
(3) great除了表示数量体积之大外,又指抽象的程度,意味着伟大性,重要性,优越性;常用于抽象
或无形的东西;用于有形的东西时,常带有伟大,大得令人吃惊等意思,含有一定的感情色彩。如:
China is a great country with a long history.
He was one of the greatest scientists.
3. cost/ take/ spend/ pay
(1) cost表示花钱,花费,付出(只能用于钱、精力、生命等;主语必须是物。)
The book cost me five yuan.
(2) take的主语是动词不定式, 通常用it做形式主语。
It took me five yuan to buy the book...
(3) spend,在主动语句中主语是人
I spent five yuan on (for) the book.或I spent five yuan (in) buying the book.
(4) pay的主语是人。
I paid five yuan for the book.
4. expensive/ high/ cheap/ low
这四个词在谈论到价格的高低时,要注意使用。expensive与high涉及到价格高,而cheap 与low涉及到价格低。
(1) expensive昂贵的,花钱多的。这个单词若谈到价格高,货贵时,其主语不能是价格,必须是货物、物品本身。如:
This watch is expensive. 这只表很贵。
These glass-products are not expensive. 这些玻璃制品不是很值钱。
注意:cheap表示价廉,便宜的,其主语也不能是价格,必须是物品本身。如:
The cheap table was bought from him. 这张便宜的桌子是他卖给我们的。
This cloth doll is very cheap. 这只布娃娃很便宜。
(2)high在表示价格时,含义是高,low在表示价格时,含义是低,这两个词不能用于物品本身,只能用在价格上。如:
The price of this watch is very high. 这只表的价格太高了。
The price of this book is not low for me. 这本书的价格对我来说是不低。
下面我们试看几个句子的正误对照:
The price of this computer is expensive.
(宜改为:This computer is expensive. 或The price of this computer is high. )
The price of this pen is not cheap for him to buy.
(宜改为:This pen is not cheap for him to buy. 或 The price of this pen is not low for him. )
5. alone/ lonely
lonely 与alone的意思比较接近,但在使用时有所区别:
(1)lonely用作形容词,意思是孤单的;寂寞的。可指心灵上的寂寞,也可指偏僻的地点。在句中既可作表语,也可作定语。
(2)alone 可作形容词和副词,意思是单独;独自,不指心理上寂寞的感觉。
She was taken to a lonely island, lived alone, but she never felt lonely.
她被带到一个荒岛上,自己居住,但她从不感到寂寞。
6. before long/ long before
(1)before long 作不久以后讲,切不要按字面译为长时间以前或好久以前。如:
We hope to finish our experiment before long. 我们希望不久(以后)就把实验做完。
(2)long before 作很久以前讲。原意为以前很久,故也可译为老早。long before 跟before long
不同,前者在其后面可以接名词或一个从句;当上下文明确时,名词或从句还可以省略。Before long 则没有上述搭配用法。
They began the test yesterday, but we had made experiment long before.
我们昨天开始做实验,但我们在那以前很久就已经做准备了。
7. as/ when/ while
(1)as 是连词,意思是当的时候,一面一面,(强调同时,一般连续时间不长),如:
As we were talking about Titanic, our teacher came in.
正当我们谈论泰坦尼克号这部电影时,教师进来了。
The students sing as they go along. 学生们边走边唱。
(2)When和as一样都是连词,注意它们的不同。如when当的时候(一般表示动作紧接着发生);那时(等立连词,前有逗号分开)
I stayed till sunset, when it began to rain. 我一直呆到太阳下山,那时天开始下雨了。
(3)while是当时候;和同时(强调同时发生,一般连续时间较长)
While I was watching TV, he was reading. 当我在看电视的时候,他正在看书。
While there is life, there is hope. 有生命就有希望。
8. beat/win/ hit
(1)beat 是动词,意思是连续地打; 打败; 敲打。beat后可接人或队名。意思是击败对手。如:
I can beat you at swimming.
(2)win意思是赢得某个项目,后面常接match, game。如:
He won a game. 他胜一局。
We won a match. 我们比赛得胜。
(3)hit意思是击中(有时可表示打一下)。如:
The mother hit her child out of anger. 妈妈生气,打了她孩子一下。
9. keep doing/keep on doing
(1)keep doing侧重表示持续不停地做某事或持续某种状态。如:
The girl kept crying all the time. 那个女孩一直在哭。
The baby kept sleeping about four hours. 这个婴儿连续睡了大约四个小时。
(2)keep on doing 表示总不断做某事,不表示静止状态。不能与sitting, sleeping, lying, standing这类词连用。如:
It kept on raining for seven days.
Dont keep on asking such silly questions.
10. get/ turn/ become
这三个词都可作系动词用,表示状态的变化,后跟表语,但三个词的用法稍有不同。get强调情感、气候和环境的变化;turn强调色彩的变化;而become则强调职务、职称等的变化。如:
The days are getting shorter and shorter in winter.冬天的白天越来越短。
She couldnt answer the question and her face turned red.她回答不出问题,脸红了。
When did you become a teacher? - Ten years ago.你什么时候当的老师?十年前。
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