However much Americans may complain that jury duty disrupts their live

Hey omsoni134

Happy to help.

You're correct that "much" is used with uncountable nouns, but there's more to the application of "much" than that. Allow me to explain:

"Much" can be used as a Noun Modifier, a Verb Modifier, an Adjective Modifier, and an Adverb Modifier. In other words, "much" can be used as an Adjective or an Adverb. It's only when "much" modifies a noun that that noun must be uncountable. Let's look at some examples quickly.

a. I don't have much money. ["much" has been used as a modifier of the uncountable noun "money"]
b. She worries too much. ["worries" is the verb, and "much" has been used as a modifier of the verb "worries", telling us "how much" she worries]
c. He is much taller. ["taller" is an adjective, and "much" modifies "taller" by telling us "how much taller"]
d. I run much faster. ["faster" is an adverb modifying "run", and "much" modifies "faster" by telling us "how much faster"]

So, as you can see from the above, "much" has 4 distinct applications.


Now, coming to our Official Question:

However much Americans may complain that jury duty disrupts their lives and that the jury selection process can be long and tedious, most agree that there is no alternative to this procedure that would ensure the right of those charged with crimes to a jury of their peers.

In this sentence, "much" describes the verb "complain" and not the subject "Americans". For example:

a. Tom complains too much.
b. Tina doesn't complain much.
c. How much Americans complain can be witnessed in this popular American talk show.

So, I hope you see that even though "much" has been placed right before "Americans", it does not describe "Americans". It modifies the verb "complain" by telling us "how much they complain".

I hope this helps.

Happy Learning!

Abhishek