此处to是介词
1)look forward to + 动名词(doing)期待做某事
I'm looking forward to doing that.
2)look forward to + 名词(n.)期待某事
I'm looking forward to that concert.
此处to是介词
1)look forward to + 动名词(doing)期待做某事
I'm looking forward to doing that.
2)look forward to + 名词(n.)期待某事
I'm looking forward to that concert.