混合虚拟语气

混合虚拟语气是指条件从句表示的动作和主句表示的动作发生的时间不一致（如一个是过去发生的，一个是现在发生的），而且一般有明确的时间状语，如 now, then, tomorrow 等提示这种差异。这时，动词的形式要根据表示的时间来调整。

e.g. 1. If Tom intended to start out this morning, he would have got everything ready last night.
2. If he had taken my advice, he would be a scientist now.
3. If it hadn't been for the doctor's care, I should not be speaking to you now.
4. If you'd listened to me, you wouldn't be in such trouble now.
5. If he were not so careless, he would not have confused Australia with Austria.