You don't know how happy I am to be here.to be可以省略吗?为什么?若不可以,它有什么作用?

But （h ） can you?Says her sister you don't know how to write you don't know how to write You don't know how to write. don’t know how much you perfect How much I love you ,you don't know how much i love you,how much i love you,you don't know,you don't know.是什么歌啊how much i love you,how much i love you,you don't know,you don't know. you don 't know how much i luv you you don't know how loved you make me I don't know how to love you翻译中文 i don't know how()(tell) you about this You Don T Know How It Feels 歌词 You Don'T Know How It Feels (Album Version) 歌词 Mr.tian,you don't know how much i hate But you don't know how i think IF YOU DON‘T KNOW HOW TO SPEAK IN ENGLISN； I don't know how to stand facing you. Don't know how to express my love for you Don't know how long can you hold?