在通常,sth is important to sb 对某人很重要 ,但是,这道题实际是It is important ___you to study English .所以因用for通常有了一个to时,人前就用for,同样译为对某人(很重要)doing sth is adj to sbTo do sth is adj for sb
我们老师说的be important to sbbe important for sb to do sth