VOA一分鐘英語：混合條件句的基本用法總結

在英語中，混合條件句（mixed conditionals）或錯綜條件句通過不同的時態，來談論與過去相反的情況所導致的現在可能發生的結果。這類句子的結構看似復雜，但如果理解了主句和從句之間的關系，就不難掌握它的用法。
 
Hi! I'm Georgina from BBC Learning English. In today's lesson, we're looking at mixed conditionals.
We usually use mixed conditionals to talk about a past imaginary situation that has a present imaginary result.
For example: If I had eaten breakfast, I wouldn't be hungry now.
The first phrase uses the same structure as the third conditional – if + past perfect. This is because it is a past imaginary situation. It's not true. I didn't eat breakfast.
The second phrase uses the same structure as the second conditional – would + infinitive (no to). This is because it is a present imaginary result. It's not true. I am hungry because I didn't eat breakfast.
Don't forget to put the comma in after the 'if' clause.
Bye for now!
 
用法總結
混合條件句的前半部分結構為 “if + 過去完成時”，用來提出與過去事實相反或不符的情況；后半部分結構為 “would + 動詞原形”，引出若之前提出的假象條件成立，現在可能發生的結果。注意，“if” 從句在前時，從句后加逗號；“if” 從句在后時，不加逗號。
If I had eaten breakfast, I wouldn't be hungry now. 
（實際上之前沒有吃早飯，所以現在很餓）
If he had studied harder, he would have a better job.   
（實際上之前沒有努力學習，所以現在的工作一般）
She wouldn't be late for the meeting if it hadn't been raining so hard.
（實際上之前雨很大，所以沒能按時到達）