look forward to do/ 还是 doing sth

look forward to doing 还是to do? look forward to do/ 还是 doing sth look forward 用法的区别look forward to do 与look forward to doing 的区别是什么,突然想不起来了. look forward to doing和looking forward to dolook forward to doing和looking forward to do的区别 还是不懂,look forward to do和 look forward to doing用法的区别 look forward to doing sth和look forward to do sth的区别? look forward to doing/expect to do 有区别吗 look forward to doing/expect to do 有区别吗 英语：look forward to doing =expect to do 急look forward to与Look forward look forward to等于 Look forward to造句 look forward to 造句 look forward to look forward to,wonder look forward to your look forward to doing. look forward to