3．e 　　　trying hard，use of strength and energy to do something

2．m　　　 feel sad because someone has died

1．a　　　 a girl or a woman who performs in TV programmes，films，etc．

4. 连系动词也可跟不定式(to do / to be),常见的有:appear, seem, remain, prove, look等。例如:

　Having a trip abroad is certainly good for the old couple, but it remains to be seen whether they will enjoy it.

　On the long journey, Peter proved to be a most interesting guide. We all had a wonderful time.

3. 能跟名词作表语的连系动词常见的有:be, become, appear, seem, prove, remain和turn等.注意:turn后跟(表示主语身份的)名词作表语时,不加冠词。例如:

　Twenty years later, he turned teacher.

　The population growth in China remains a problem.

2. 一般情况下,连系动词主要跟形容词或分词作表语。例如:

　Be careful when you cross this very busy street. If not, you may get run over by a car.

1. 有些连系动词通常不用于被动语态和进行时态中。如:feel, taste等词。例如:

　-Do you like the material?

　-Yes, it feels very soft.

3. "变化"类:表示由一种情况或状态变化成另一种情况或状态。这类连系动词强调"变化"后的情况或状态.常见的有:become(变成), turn(变成), grow(变得), go(变得)等。例如:

　Put the fish in the fridge, or it will go bad in hot weather.

2. "持续"类:表示某种情况或状态的持续。这类连系动词强调"持续"。常见的有: remain(依然),keep(保持),stay(保持),continue(继续、仍旧),stand(处于某状况或情形)等。例如:

　Why don't you put the meat in the fridge? It will stay fresh for several days.

　It's already ten in the morning. The store remains closed. What's the matter?

1. "存在"类:表示存在或具有某种特征或状态.这类连系动词强调"存在"。常见的有:be(是),look(看起来),feel(摸上去),seem(似乎是),appear(似乎、显得),prove(证明是),smell(闻起来),taste(尝起来),sound(听起来)等。例如:

　The story sounds true.

　Those oranges taste good.