It must be wonderful to camp in the mountains.

It’d be nice to have some rest.

It must be wonderful to camp in the mountains.

What I need is a good sleep.

I could do with some exercises

You know what ?

I’d like a change on the beach.

Oh, good idea.

That’s it !

So, we are going to the sea!

想表达自己的想法，可以直接说出来嘛：

What I need is , I’d like

或者I could do with ,could do 这个片语在这里表示需要的 意思。

另外一种办法就是以建议的方式说出自己的欲求，比如：

It’d be nice to have some rest.

It must be wonderful to camp in the mountains