Is there anything to do/do/doing 哪一个 具体用法如何 I have nothing 后

Is there anything to do/do/doing 哪一个 具体用法如何 I have nothing 后 There is nothing to worry about.Do you have anything to --- Do you have anything ____this afternoon?If there is nothing do nothing but do there is nothing to do but do/doing用哪个?举例说 there is nothing to do I have nothing to do there is nothing to do expect do Is there anything I can do to help? Is there anything which I can do to help you but there is nothing I can do to make a difference 请问如何翻译? have done nothing but do 、done 、doing、to do? have nothing to do but do sth还是doing sth