I'm sad to be here watching you all hearing back home这句话是什么意思?

I'm sad to be here watching you all hearing back home这句话是什么意思? ,I'm glad to be here with I am sad to be here watching you all heading back home 句中watching用法 请帮分析一下句法结构:I'm sad to here watching you all head back home.请问这里为何用现在分词?能否再给一例子?噢,sorry,应该是to be here. I'm lucky to be here中to be here 是作状语还是补语? Here i'm to be together with you 是不是病句? (i'm come back,but i's so unhappy,now is very sad ,i'm go to sleep,please be hey,boy,where are you going?.....sorry,I don't konw.oh,that's ok...everyone stay at here because they haven't known where to go........you are sad,aren't you?I guess the cause,ah,may be a lady?...no,I'm sad just because I don't know how to forget.... 英语填空：I'm new here.It is the______time for me to be here. 求教一首英文歌曲名称和下载地址歌词：Comes the morning when I can feel Than there's nothing left to be concealed Moving on a scene surreal But my heart will never Never be far from here Sure as I'm breathing Sure as I'm sad I'LL keep I‘m lucky （be）here to say what I want to say. Don't be sad,i'm always with i'm very glad to be here.还有干吗用be?come可不可以 I said honey you are not necessary to be sad 求一首英文诗,To All My Friends其中一句是Whenever you’re sad,feeling blue.Just call on me.I’ll be here for you. I' m so sad I' m so sad.. I'm here,don't be