形容词和副词在句中的作用难点突破讲解
（一）形容词在句中的作用
1.形容词作主语补足语和宾语补足语
可以表示“现状, 状态”; 也可以表示某一动作的结果, 常用在表示“认为, 看待”等动词后,
We found this book interesting.
我们发现这本书有趣。
2.形容词作状语
可以看作是“being＋形容词”结构或when, if, because等从句的省略, 表示时间、方式、原因、伴随、让步、条件等, 也可以表示对主语进行解释, 说明主语是什么情况, 或进行强调, 其逻辑主语必须与句子主语保持一致。
Helpless, we watched our home destroyed before our eyes.
我们束手无策，只能眼睁睁地看着自己的家园被毁掉。
3.形容词作表语
部分形容词作表语时，常不用人作表语。
Possible、impossible、necessary、convenient、inconvenient（注：likely例外）
（二）副词在句中的作用1.副词作状语
修饰动词、形容词、副词、介词短语等，还可以修饰句子和连接上下句子顺序。
Obviously you are wrong.
很显然，你错了。
2.副词作定语
总是放在被修饰名词之后，若置于修饰名词之前，则通常被视为形容词。
the upstairs room和the room upstairs 都表示“楼上的房间”，但前者的upstairs 前置，为形容词；后者的upstairs后置，为副词。
3.副词作表语
英语中用作表语的副词主要是表地点的副词以及某些与介词同形的副词，而且只能用于连系动词be 后作表语，而不用于其他连系动词后作表语。 可说He is here 或 He is abroad，但不能说He seems here 或 He seems abroad。
1. —What are you doing this Saturday?
—I'm not sure, but I ________ go to the Rolling Stones concert.
A．must B．would C．should D．might
2. Since nobody gave him any help, he ________ have done the research on his own.
A. can B. must C. would D. need
3. When I was a child, I ________ watch TV whenever I wanted to.
A. should B. could C. must D. need
4. He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
A. wouldn't B. shouldn't C. couldn't D. mustn't
5. I should not have laughed if I ________ you were serious.
A．thought B．would think C．had thought D．have thought
6. If we ________ a table earlier, we wouldn't be standing here in a queue.
A. have booked B. booked C. book D. had booked
7. —You needn't take an umbrella. It isn't going to rain.
—Well, I don't know. It ________do.
A. might B. need C. would D. should
8. It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
A．may B．couldn't C．should D．needn't
9. Harry is feeling uncomfortable.He ________ too much at he party last night.
A．could drink B．should drink C．would have drunk D．must have drunk
10. If he had spent more time practising speaking English before, he ________ able to speak it much better now.
A. will be B. would be C．has been D．would have been
