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.

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?

4. 定语从句

[名师讲解]

3. 动词不定式

2. 过去完成时

1. 过去将来时

35. ---There is a little traffic accident． 36. ---There's a big traffic jam. 37. ---Well, I'm sure he'll be here before long. 38. ---I'm beginning to get angry with him! 39.---Yes, we can't wait any longer. Let's go without him. 40. ---That's terrible! 41. ---That's a really bad excuse! IV. 重要语法

34. ---Come down, Polly!

33. ---Can you remember anything else about him?

32. ---There’s no need to thank me.