look forward to 是什么词性?动词 还是 介词

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. 急look forward to与Look forward look forward to 后接什么词? 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 look up/look forward to 英语：look forward to的同义词是什么?要3个词 look forward to 中各个词是什么词性希望高手解答 look forward to 是什么词性?动词 还是 介词 look forward to是什么词性,形容词还是什么 I’ll Look forward to seeing you soon中文是什么? LOOK forward TO 还是LOOK FORWARDS TO