There are many advantages to 后面到底是接 do原形呢?还是doing?

问题描述:

There are many advantages to 后面到底是接 do原形呢?还是doing?
我一直以为是接原形的,就像There are many things to do today.
可是今天看到一本教科书上却用doing ,不太懂,
教科书原句 There are many advantages to choosing PS camping.

to do是后置定语,拿掉不影响句子的
比如I have much homework (to do )today.
doing是做主语的
这应该是个句型吧记住就行了