2. 行為動詞：主語+行為動詞(+其它)。 如：  We study English. 我們學習英語。

　　當主語為第三人稱單數(he, she, it)時，要在動詞后加"-s"或"-es"。如：Mary likes Chinese.瑪麗喜歡漢語。

　　動詞+s的變化規則

　　1．一般情況下，直接加-s，如：cook-cooks, milk-milks

　　2．以s. x. sh. ch. o結尾，加-es，如：guess-guesses, wash-washes, watch-watches, go-goes

　　3．以“輔音字母+y”結尾，變y為i, 再加-es，如：study-studies

　　（2）一般過去時:

　　動詞過去式詳解   動詞的過去式的構成規則有：

　　Ａ、規則動詞

　　①    一般直接在動詞的后面加ed：如　worked , learned , cleaned , visited

　　②　以e結尾的動詞直接加d：如　lived , danced , used

　　③    以輔音字母加y結尾的動詞要改y為i再加ed（此類動詞較少）如　study – studied carry – carried worry – worried  （注意play、stay不是輔音字母加y,所以不屬于此類）

　　④  雙寫最后一個字母（此類動詞較少）如　stopped

　　Ｂ、不規則動詞（此類詞并無規則，須熟記）小學階段要記住以下動詞的原形和過去式：sing – sang ,  eat – ate ,

　　see – saw , have – had , do – did , go – went , take – took , buy – bought , get – got , read – read ,fly – flew , am/is – was ,

　　are – were , say – said , leave – left , swim – swam , tell – told , draw – drew , come – came ,  lose – lost , find – found , drink – drank , hurt – hurt , feel – felt

　　（3）一般將來時：

　　基本結構：   ①be going to + do；

　　②will+ do.      be going to = will

　　I am going to go swimming tomorrow（明天）. = I will go swimming tomorrow.

　　（4）現在進行時: am,is,are+動詞現在分詞

　　動詞現在分詞詳解   動詞的ing形式的構成規則：

　　①    一般的直接在后面加上ing , 如doing , going , working , singing , eating

　　② 以e 結尾的動詞，要先去e再加ing　，如having , writing

　　③ 雙寫最后一個字母的（此類動詞極少）有：running , swimming , sitting , getting