looking forward to doing还是do

　　doing。look forward to后面要加doing，是因为to在这里是介词，介词后加名词或者是动词的ing形式，所以是look forward to doing，意思是期盼做某事。

　　look forward to 后面只能跟动名词或名词意思和expect to do sth 一样：

　　如：

　　I am looking forward to seeing you soon. = I expect to see you soon.

　　I am looking forward to your early reply. = I extpect to receive your reply

　　而且一般都是 be looking forward to doing sth 表示一直期待的意思