It is important for us to learn English well. 为什么用to learn是用

It is important for us to learn English well. 为什么用to learn是用 it is important —— us to learn English well 横线上 用for 还是to It's important for us to learn English well. 1._____ is important for us to learn English well. （ ）is important for us to learn English well It is very important for us to learn English well.这个句子中for u 用英语解释句子：To learn English well is important for us. 英语连词成句1.well,it,English,is,learn,important,to,us,for坐等 It is important to us (learn)English I think it's important (for us to learn)English well.为什么要填这个 it is （p ） for us to learn english well to learn English well is important to us .