We often use (opinion + fact) adjective for example : "an interesting young man" , "a nice long table" etc.
And also we use (adverb+adjective) for example : "a reasonably cheap restaurant" , "an extremely good game" etc.
As far as I know we don't use (opinion + opinion) adjective instead of (adverb+opinion adjective)
I mean we don't use "a reasonable cheap restaurant" instead of "a reasonably cheap restaurant"
Is there any rule about this context I don't know ? or Is it just a more idiomatic way to use?
Best Answer
Adjectives modify nouns. A is an adjective, B is an adjective, and C is a noun.
This means C is A and B.
Adverbs modify verbs or adjectives.
C is B. A provides more information about B.
So the adverb is modifying the adjective, and the modified adjective is then modifying the noun.
"Reasonably restaurant" isn't something you can take away from this sentence. It's a cheap restuarant. How cheap? Reasonably cheap.
Now - you can say reasonable restaurant to mean a restaurant that is reasonable in some way, and one of those ways can be price. Context has to support this.