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 don't think he can come.
I don't 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.