请教有关"I want you to be happy "的语法现象

今天遇到二句简单英语,但十分想不通它们的语法及意义的区别: I want you to be happy. I want you to happy.
请高人给指点一下,这二句从语法结构上讲,有啥不同? 第一句中为啥用be happy? 它又是啥成分啊?
谢谢

翻译"I want together with you forever" I WANT YOU是什么意思？ I want you是什么意思？ 一首英文老歌曲歌名,歌词中有" I want you back, want you back" I want you的歌词？ all i want is you 翻译 I Really Want You i want you help .thank you "I want to enbrace you like this forever."是什么意思？ "Do you want me to lend you some money?"I wish you_,i could pay you back "空格为什么填WOULD?