“Have good eating habits is important.”这句中为什么要用is?

“Have good eating habits is important.”这句中为什么要用is? Having good eating habits is very important.这里的have和eat为什么用动 Having good eating habits is important中的having 能否用have , Healthy eating is very important to you. Good eating habits habits,is,children,have,for,it,good,important,to,eating(连词成句 英语改错：Have healthy eating habits is quite important. Having good eating habits is very good.为什么用is 不用are? my eating habits is pretty good.eat为什么加ing? Maybe his eating habits is not good.可能他的饮食习惯不好.为什么用“is”啊? ______(develop)healthy eating habits is important to the stu 英语翻译It is necessary for us to have good eating habits They a （ ）is important to have some good habits.A.It B.that C.This