He is younger than me中的than后面为什么不是I am?

I'm younger than you are.为什么最后要加一个are 如果说 我比他年轻 怎么说?I'm younger than he is. i am younger than him 对还是 i am younger than he is对?为什么? He sister is ( )than he A.younger five years B.five years younger C.five year youngerD.five younger years he is ( )younger than you,but he looks ( )tallehe is ( )younger than you,but he looks ( )taller than you哪个用many哪个用much?为什么! My brother Tom is three years younger than me.H(),he is taller than me Is Amy younger than Sam? 把My brother is Sam.He is younger than me.合成一句话,急.把My brother is Sam.He is younger than me.合成一句话,急. He is younger than me中的than后面为什么不是I am? I'm older than my sister.(同义句)My sister ______ ______ ______ ______.是填is younger than me 还是is younger than 怎么区分? 急,译成中文：SuYang is twenty minutes younger than SuHai.He is one year younger than me.然后模仿造两个句子. 改错He is younger and stronger than you do.为什么要删去do He is(much)younger and stronger than you.括号内是否正确? 改错：He is younger and stronger than you do为什么要去掉do 说清楚 he is much younger than my uncle 这句话有错吗much要用more吗 求秒杀 1.He is not as tall as his younger brother He is ---- ---- than his younger brother.2.Mr Wang isone of the p---- teachers in our school. She is two years younger than he.这句话用的什么语法two years younger than 这里具体不太懂,以后这类句子该怎么写? 3.---Is John _______ person in his office?---Yes.He is ________ than any other person.A.the youngest; the youngest B.younger; the youngestC.the youngest; younger D.younger; younger Yes,Tom is younger than lily