英语语法基础知识：动词的四种时态

　　动词的时态同学们经常会混淆，下面小编整理了英语语法基础知识：动词的四种时态，希望对大家有帮助！

　　(1)一般现在时：

　　一般现在时的构成

　　1. be动词：主语+be(am, is, are)+其它。如： I am a boy. 我是一个男孩。

　　2. 行为动词：主语+行为动词(+其它)。 如： We study English. 我们学习英语。

　　当主语为第三人称单数(he, she, it)时，要在动词后加"-s"或"-es"。如：Mary likes Chinese.玛丽喜欢汉语。

　　动词+s的变化规则

　　1.一般情况下，直接加-s，如：cook-cooks, milk-milks

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

　　3.以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies

　　(2)一般过去时:

　　动词过去式详解 动词的过去式的构成规则有：

　　A、规则动词

　　① 一般直接在动词的后面加ed：如 worked , learned , cleaned , visited

　　② 以e结尾的'动词直接加d：如 lived , danced , used

　　③ 以辅音字母加y结尾的动词要改y为i再加ed(此类动词较少)如 study – studied carry – carried worry – worried (注意play、stay不是辅音字母加y,所以不属于此类)

　　④ 双写最后一个字母(此类动词较少)如 stopped

　　B、不规则动词(此类词并无规则，须熟记)小学阶段要记住以下动词的原形和过去式：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)一般将来时：

　　基本结构：

　　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)现在进行时: am,is,are+动词现在分词

　　动词现在分词详解 动词的ing形式的构成规则：

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

　　② 以e 结尾的动词，要先去e再加ing ，如having , writing

　　③ 双写最后一个字母的(此类动词极少)有：running , swimming , sitting , getting.