would rather ...than 情态动词

请看下面的例句,相信你就会明白的.
The soldiers would rather die than surrender.
士兵们宁死不屈.
（句型是：would rather DO than DO）
I would rather have slept than watched TV.
我宁愿睡了觉而不是看了电视.
（句型是：would rather HAVE DONE than DONE）
I would rather be learning English than playing the piano.
我宁愿现在在学英语而不是在弹钢琴.
（句型是：would rather BE DOING than DOING）

宁愿做A也不做B,would rather A than B.

语法当中的平行结构，即than 前后语法结构相同。