卫生类职称英语考试语法（8）
2015-03-03 16:18 来源：医学教育网
卫生类职称英语考试语法：
动词的种类
动词是指表示动作和状态的词。
动词可分为：及物动词、不及物动词、系动词、助动词和情态动词。
1.及物动词
He is writing a letter.
Is mell flowers.
2.不及物动词
We lived in London.
The window has opened.
3.系动词
He is a student.
That sounds good.
The child seems unhappy about it.
4.助动词
助动词通常有 be,do,have。如：
Do come in,please.
I don't feel very well.
We have just finished the work.
当be,do,have用作普通动词时，它们有一定的词汇意义。如：
I have one sister.
You can do it as you like.
5.情态助动词
情态动词表示说话人对所说的话的态度和看法。
Can she speak Arabic?
It may well rain.
People shouldn't ill-treat animals.
Will you help me,please?
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