形式

意義

舉例

人稱(chēng)

與主語(yǔ)在人稱(chēng)一致

I am reading now. 第一人稱(chēng)

數(shù)

與主語(yǔ)在數(shù)上一致

He writes well. 第三人稱(chēng)單數(shù)

時(shí)態(tài)

表示動(dòng)作發(fā)生的時(shí)間

He wrote a letter to me last month. 過(guò)去時(shí)態(tài)

語(yǔ)態(tài)

主語(yǔ)是動(dòng)作的發(fā)生者或者承受者

We study English。主動(dòng)　

The road was filled with rubbish. 被動(dòng)

語(yǔ)氣

說(shuō)話(huà)人表達(dá)事實(shí)、要求、愿望等

He has flown to America. 事實(shí)　

I wish I could fly to the moon some day. 愿望