动词使用

动词不能连用

错误：I like play the piano. 正确：I like to play the piano.

两个动词连用，第二个动词前加to或变为-ing形式

如果一定要同时用两个动词，第二个动词的前面必须加to，或是给该动词加上-ing。 错误：I like swim. 正确：I like to swim. / I like swimming.

动词第三个称单数形式一般直接加s，在一般现在时中，主语如果是第三个称单数，动词必须用第三个称单数形式，一般加s。

错误：She sing very well. 正确：She sings very well.

变否定句一般不可直接在肯定句中加not，绝大多数的肯定句变否定句不能直接在句中加not，必须借助动词或使役动词。

错误：I not want to go. 正确：I don’t want to go.

to + 动词原形，在不定式to的后面，必须用动词原形。

错误：She wants to becomes a good teacher. 正确：She wants to become a good teacher.

助动词，除了do之外，can，may，might，would，will，must等也都是助动词，助动词后须接动词原形。

错误：You must practiced your English every day. 正确：You must practice your English every day.

问句要用助动词，含be动词以外的一般动词，其一般疑问句的词序为：助动词+主语+动词原形。当疑问词不当主语时，词序为：疑问词+be动词/助动词+主语。

Do you know her name? What are you doing?

动词随主语形式的变化而变化，动词除了会随时态不同而做相应变化之外，也会因主语的不同而发生变化。

I have a good student. She has a big heart.