什来自么是三单

什来自么是三单

一般现在时主语单三人称时的动词变化

①在一文沿源江敌密安杨降般现在时中，当主语为第三人称单数时，动词要用“s”型(即第三人称单数形式)。

②重终几架所谓动词“s”型的构成，可按名词变复数的规则来记，即:

(1)在动词尾直接加s。如:

play-plays庆演亮验二升毛边称，want-wants，wor九林促备正请k-works，know-knows，h巴脚伤电占备行史elp-helps，get-g回伯有话妒告混放ets

(2)以字母s、x、ch或o结尾的动词加-es;如:

guess-guesses，fix-fixes，teach-teaches，brush-brushes，go-goes，do-does，watch-watch掉es，catch-catches

(3)以辅音字母+y结尾的动词，先变y为i，再加-es。如:

study-studies，c烈界用支史煤类质示按照arry-carries，fly-flies，worry-worries

③④强调如何将主语是第先所三人称单数的肯定句变为否定和疑问句。现举例说明:

1)Hismotherworksinaf静曾应六满血actory.

Hi跟湖学段smotherdoesn’tworkinafactory.

Doeshismotherworkinafactory?

2)MrLiteachesusEnglish.

MrLidoesn’tteachusEnglish很五特距步垂范战.

DoesMrLiteachyouEnglish?

3)M教附文置ybrotherstudiesmaths木算我well.

Mybrotherdoesn'tstudymathswell.

Doe火syourbrotherstudymathswell?

其实三单的变化形式跟名词变复数是一样的。

好好学习哈O(∩_∩)O