一般現(xiàn)在時(shí)的肯定句中，主語為第三人稱單數(shù)的動(dòng)詞變化主要體現(xiàn)在詞尾的變化上，現(xiàn)在就給大家簡單的介紹一下其中不同的規(guī)則。

變動(dòng)詞單三人稱口訣

二聽四看一感覺，使役動(dòng)詞有三個(gè)。或：一感二聽三使四看。

一感；feel 二聽：hear,listen to

三使：make ,let ,have 四看：look at,see,watch,notice

使用口訣：感使動(dòng)詞真奇怪，to在句中象妖怪。 主動(dòng)句里它走開，被動(dòng)句里它回來。

動(dòng)詞let要除外，to詞可來可不來。

動(dòng)詞單三變化規(guī)則

1.一般情況下，直接在動(dòng)詞詞尾+s：

2.以s，x，sh，ch，o結(jié)尾的動(dòng)詞，在詞尾+ es：

3.以輔音字母+ y 結(jié)尾的動(dòng)詞，先把y變?yōu)閕，再加es：

4.不規(guī)則動(dòng)詞（特殊情況）：

變否定句時(shí)遵循的規(guī)則

含有動(dòng)詞第三人稱單數(shù)形式的句子變否定句時(shí)，要在動(dòng)詞前面加上doesn’t 或does not，動(dòng)詞的第三人稱單數(shù)形式要還原成原形：格式為doesn’t/does

not+ 動(dòng)詞原形，如：

He goes to school at six in the morning. (變否定句) 就變換為：

He doesn't go to school at six in the morning.

2.變一般疑問句：把含有動(dòng)詞第三人稱單數(shù)形式的變成一般疑問句時(shí)，要借用助動(dòng)

詞does，如：

She goes home at five every day.（變疑問句）就變換為：

Does she go home at five every day? -- Yes，she does./No，she doesn’t.

哪些主語是第三人稱單數(shù)

1.人稱代詞he，she，it；

如：He likes watching TV.

She has lunch at twelve.

It looks like a cat.

2.單個(gè)人名、地名或稱呼作主語；是第三人稱單數(shù)。如：

Han Mei looks like her mother.

Beijing is in China.

Uncle Wang often makes cakes.

3.單數(shù)可數(shù)名詞或

this/that/the+單數(shù)可數(shù)名詞作主語時(shí)，是第三人稱單數(shù)；

A horse is a useful animal.

This book is yours.

That car is red.

4、不可數(shù)名詞作主語時(shí)為第三人稱單數(shù)。如：

The milk is in the glass.

The bread is very small.

The water is very cold.