1. To what extent are you concerned?
2. I am concerned about the matter to the full.
3. I am concerned about the matter on a small scale.
[Are the answers correct? The propositional phrases at the end are adverb phrases, aren't they?]
In #2, I'd write "... to the fullest."
Yes, in these sentences, the prepositional phrases are adverb phrases.
Yes, the propositional phrases at the end of each statement are indeed adverb phrases. However, the answers provided may not fully align with the question being asked.
1. The question asks about the extent of your concern, which could be measured on a scale from minimal concern to extreme concern. Your response does not specify a particular extent; it simply states that you are concerned.
2. Your response indicates that you are concerned about the matter to the fullest extent. In this case, "to the full" can be seen as an adverb phrase modifying "concerned." It suggests that your level of concern is high or even maximal.
3. Your response indicates that you are concerned about the matter on a small scale. This statement does provide a specific extent of concern, indicating that your level of concern is minimal or limited.
Overall, the adverb phrases in these statements modify the verb "concerned" and describe the extent or degree of concern. However, the answers themselves might not fully correspond to the given question.