求解这道动词填空为什么是加ing!understanding yourself is important to ___(

Understanding yourself is very important to （）（build）self-co It is also important to do some reading and writing 为什么加ing Do you understand how important knowing English is?为什么动词是ING 高一英语语法填空.It is important to have an understanding of Austral 英语开头动词.有些动词开头是加ing.ed或者to.为什么?什么情况下要加ing.ed或者to. my,friend,is,a,very,understanding,person那个加ing 是 there is no credible path to stabilising,这句话中为什么加ing呢,不是直接动词 为什么要有have a better 和 understanding 为何加ing Be动词后面加ingKate is flying to HeBei this winter.为什么要用be+动词ing? difficult是加动词ing?还是加to do sth. 这个英语句子中为什么to后面加动词ing? he is后动词是加ing还是S