动词是动作或状态的词,分四类。
1、be动词,具体包括am,is,are,它在句子中表示存在、判断等作用。
举例:
He is here.(他在这儿)。 is表示存在。
She is a teacher.(她是一名教师)。 is表示判断。
2、行为动词,表示具体的动作。比如,play ,come,visit
举例:
She plays the violin every day.
We visited the zoo last sunday. 注意人称、时态、单复数
3、助动词,本身没有意义,和其他行为动词参与构成句子,表示时态等关系,具体包括do(does,did),be(am,is,are),用于一般疑问句。
举例:
Do you play the violin every day?
Does she play the violin every day?
Did you play the violin last sunday?
4、情态动词,表示说话人能否、意愿等情态,具体包括can,may,must,would
举例:
I can speak English.
You may come in.
You must finish the homework.