it is up to sb for sth 还是to do sh?

it is up to sb for sth 还是to do sh? 是sth is important to sb还是 it is important for sb to do sth? 请问,It is up to sb.to do sth. It is possible for sb(sth) to do sth be up to do be up to doing be up to sb to do sth it is up to "It is+adj.+to+sb.+to do sth." 和 “It is + adj.+for +sb.+to d 造句It is+a.+for sb.+to do sth. It is adj 造句 for sb to do sth 造句 Is it necessary for sb to do sth 同义句 find it (is) +adj+for sb.+to do sth. it is easy for sb to do sth It is+adj for sb to do sth 造句