sb.is up to sth.

sb.is up to sth. sb.is up to sth. 请问,It is up to sb.to do sth. sb.spends some time doing sth.it is+adj.+for sb.to do sth.it's up to sb.to do sth.造句 各两句 it is up to sb to do sth以及他的用法, it is up to sb for sth 还是to do sh? call up sb doing sth还是to do sth? is+形容词+for sb .+to do sth. 可以说sb is suitable to do sth? it's up to sb.to do sth. 两个句型‘～1.be important to sb./sth.2.build sb./sth.up请问, 英语翻译用sb./sth.is believed to do sth. It is possible for sb(sth) to do sth 有没有pick sb up to do sth 这种句型? turn sth.up和force sb to do it is up to sb to do it is adj.of sb.to do sth.it is adj.from sb.to do sth. 是sth is important to sb还是 it is important for sb to do sth?