一般现在时态中，第三人称单数名词或代词做句子的主语时，谓语动词后面要加-s或-es,但并不是所有的动词直接加就可以了，这是有变化规律的：
1.一般情况下，大多数动词后面直接加-s,比如：
He works very hard.
My father walks to factory everyday.
2.以o结尾的动词加-es,比如：
She goes to school as usual.
He usually does his homework very carefully.
3.以s,sh,ch,x等结尾的动词加-es ,比如：
My grandfather watches TV every night.
My son always finishes homework before ten o`clock every Sunday.
Every time his watch has stopped,he always fixes it by himself.
4.以辅音字母 y的动词，把y变成i再加-es,比如：
In summer,he always carries an umbrella.
He often gets up late and hurries to school.
5.以元音字母 y结尾的动词直接加s.
Hurricane always destroys many houses.
Mary plays the piano each night.
6.动词原形后面有e时，直接加-s,比如：
LiMing likes playing football.
Uncle Wang often makes cakes.
