Hi,
Great follow ups! I have touched up my response to be more clear about when to use an adverb or adjective in the original question. Here are my responses to your follow up questions.
Just to clarify-The sentence that I wanted to write was: Though margarine was introduced as a supposed healthier alternative than butter, recent studies suggest it is as harmful as or worse than butter.
Since the studies suggested that margarine is as harmful or worse than butter, we would be in doubt that margarine is a healthier alternative, right? That was why I was thinking it should be supposed. Would it make sense?
This is tricky because the meaning differences are subtle. Let's look at the two situations:
1. Though margarine was introduced as a
supposed healthier alternative to butter
In this case, supposed is modifying the noun phrase healthier alternative. What is in doubt is whether margarine truly is a healthier alternative.
2. Though margarine was introduced as a
supposedly healthier alternative to butter.
In this case, supposedly is modifying the adjective healthier. According to this version, what is in doubt is whether margarine truly is a healthier. The context of the sentence tells us that this is exactly what is disputed about margarine, so I like this version better.
One more qn. You stated that healthful alternative is a noun phrase. Can an adverb modify a noun phrase? I thought we would need an adjective to modify a noun phrase.
Great question! Adjectives in general modify noun phrases. Adverbs CAN modify noun phrases, but typically do so according to degree, defining the extent to which something is defined by the noun phrase.
Adverbs more commonly modify adjectives. Here's how these differences play out in the linked question:
supposed Mediterranean predecessors: noun phrase "Mediterranean predecessors" is modified by supposed.
Good job, you are absolutely correct! Adjectives typically modify nouns and noun phrases so this makes perfect sense. Meaning wise, what is "supposed" is whether the "Mediterranean predecessors" preceded the ruins in Brittany.
supposedly Mediterranean predecessors: adjective "Mediterranean" is modified by supposedly.
You got it! Adverbs mainly modify verbs, but this problem highlights how adverbs may also modify adjectives. Meaning wise, what is "supposed' is whether the predecessor ruins were Mediterranean.