为什么spend+doing look forward to+doing like+doing like+to do

为什么spend+doing look forward to+doing like+doing like+to do look forward to doing. look forward to doing 还是to do? look forward to do/ 还是 doing sth feel like to do还是doing?为什么? look forward to doing 为什么要用doing look forward to doing和looking forward to do look forward to (doing )sth look forward to (doing) sth. 用look forward to,be going to,because,like doing,not like doi like doing 与like to do like to do 和 like doing区别