请把下面的英文改成倒装句(1) If the design had been ready, we should have
请把下面的英文改成倒装句
(1) If the design had been ready, we should have started working yesterday.
(2) Though the problem is complicated, a computer can work it out in a few minutes.
(3) The manager didn't leave this office until it was dark.
(4) The horse went off