look forward to意为期盼，盼望。to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+名词
1. I look forward to your guidance.
我期待获得你们的指导。
2. Look forward to your reply.
期待你的回信。
look forward to+动词ing
3. I look forward to playing with you again.
我期待下次再和你玩。
4. I look forward to hearing your views.
我期待着听取你们的意见。
5.Are you looking forward to meeting him again?你很期待再次和他见面吗?