I can't do much for that.
There is too much to be done.
At first I assumed there is an omitted noun after "much"? But the possible applicable nouns I knew, such as "works", or "anti-measures", are countable. So if one of them is the omitted noun, the phrase should be "do many" instead.
So I thought "much" should be an adverb modifying the verb "do". But in this case, the construction "too much to be done" seemed strange, and I'm not exactly sure whether it is grammatical.
Looking up at the dictionary, it says that "much" is also a noun itself, which should be the case in these examples. But still, I can't seem to get rid of the implications of the two above explanations.
If it continues to say exactly how much is to be done, it's likely it would list something countable, say task A and task B. So in this example:
There is too much to be done, such as task A and task B.
Is it correct, and natural to native speakers?
Under my first understanding of "do much", the adjective "much" doesn't match the noun "task". Under my second understanding, the listed tasks sound unrelated to "much to be done". Both of them seemed weird to me.
And this expression hides the problem a bit:
There is too much to be done, such as doing task A and task B.
But to me it's likely just an unnecessary obfuscation.
And if it is wrong or not natural, how to express this idea correctly?