第一：单数的句子变成复数的句子把单数的句子成复数的句子很简单：变法是把能变成复数的词变成复数，但a或an要把去掉。
特殊疑问词、形容词、国家及地点通常不变。把下列句子变成复数1、I have a car we have cars2、He is an American boy. They are American boys3、It is a car They are cars4、This is an eraser These are erasers5、That is a backpsck Those are backpacks6、I'm an English teather We are English teathers7、It's a new shirt They are new shirts8、He's a boy They are boys9、She's a singer They are singers10、What's this in English? What are these in English?第二：就划线部分提问就划线部分提问的变法：1、先根据划线部分找到特殊疑问词。
2、 再把没划线的部分变成一般疑问句的语序。
3、 特殊疑问词通常有：what/ where/ who /whosc/ how/how old/ what colour/ what class /what grade/what row/what school四年级下册英语语法知识点：一般现在时一般现在时的功能1.表示事物或人物的特征、状态。如：The sky is blue.天空是蓝色的。
2.表示经常性或习惯性的动作。如：I get up at six every day.我每天六点起床。
3.表示客观现实。如：The earth goes around the sun.地球绕着太阳转。一般现在时的标志词：often, usually, sometimes, every等一般现在时的构成主语+动词原形。如： We study English. 我们学习英语。当主语为第三人称单数(he, she, it，my father等)时主语(三单)+动词的三单形式(要在动词后加如：Mary likes Chinese.玛丽喜欢汉语。一般现在时的变化否定句：主语+ don't( doesn't ) +动词原形(+其它)。 如： I don't like bread. He doesn't like bread, too.一般疑问句：Do( Does ) +主语+动词原形+其它。 如： Do you go to school by bike? Yes, I do. / No, I don't.当主语为第三人称单数时，要用does构成一般疑问句。 如： Does she go to school by bike? Yes, she does. / No, she doesn't.特殊疑问句：特殊疑问词+一般疑问句。如：How dou you go to school? How does your father go to work?动词的第三人称单数的变化规则1.一般情况下，直接加-s，如：cook-cooks, make-makes2.以s. x. sh. ch. o结尾，加-es，如： wash-washes, watch-watches, go-goes3.以“辅音字母+y”结尾，变y为i, 再加-es，如：study-studies 但play-plays不规则变化：have-has
