急求look forward 与look forward to 的区别

急求look forward 与look forward to 的区别 急look forward to与Look forward look forward to和look forward to doing的区别 expect 和 look forward to的区别 look forward to和hope的区别 look forward 用法的区别 look forward to 与 look forward for 区别,比如：I am looking forwar look forward to 的意思 look forward to 的用法 look forward to的用法? look forward to doing sth和look forward to do sth的区别? 还是不懂,look forward to do和 look forward to doing用法的区别