1、用法一：可以省略to be的系动词，比如：seem, appear, turn out
The examination turned out( to be)easy.
结果是考试很容易。
The baby appears(to be) hungry.宝宝似乎是饿了。
She doesn't want to go on studying. It seems a pity
她不想学下去了,这似乎很可惜。
2、用法二：作系动词的感官动词，比如：look,feel, sound, taste, smell
Tom felt sleepy so he decided to take a nap
汤姆感到困了,所以决定小睡一会儿。
You sound unhappy. what's the matter?
你说话听起来不高兴。怎么回事?
3、用法三：表示变化的系动词，比如:go,get,fall,turn,grow, become等。如:
fall ill生病, fall asleep睡熟, turn writer= become a writer成为作家, go bad/mad/ blind/ grey/pale变坏/变疯/变瞎/头发变白/脸变苍白, go unnoticed未被注意到, get hurt受伤, get angry生气
The rain is getting heavier and heavier.
雨变得越来越大。
4、用法四：表示“保持”之意的系动词，比如: remain( silent),keep( quiet),stay( motionless)
Please remain seated until the plane has come to a complete stop.
请坐在座位上直到飞机完全停稳。
How do you manage to stay young and fit?
你又年轻、又健康,是怎么保持的?
5、当然，学好语法不是一两天就可以学好。每一种语言都需要长期去积累，去摸索语言的规则，才可以把这门语言学好，英语这门语言也不例外，需要同学们在平时的学习时间里，要合理安排学习英语的时间，因为科学，合理的学习时间可以更高效地提高英语水平。
