动词不定式通常带有符号to,叫做带to的动词不定式(infinitive withto),动词不定式有时不带符号to,叫做不带to的动词不定式(infinitive withoutto)
不带to的动词不定式通常有下面十八种情况
一、与助动词do连用构成谓语动词的否定、疑问和强调形式。
(1)he does not work in the factory.
(2)Does she work here?
(3)I did not see her yesterday.
(4)Did they take you home?
(5)He does look tired.
(6)They did come yesterday.
二、与情态动词连用构成复合谓语
(1)I can speak English.
(2)May I come in?
(3)Dare he swim across the river?
(4)We must work,and above all we must believe in ourselves.
(5)Could you do something for me?
(6)You shall go at once.
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2016-02-29
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