In some places on the internet they say that stative verbs like to feel to have to desire to look, to name only a few, cannot be modified by adverbs of manner that are normally formed by adding -ly to an adjective.
Is this true?
I think such a blanket rule is ill-advised. Many "stative" verbs can also be used dynamically.
I deeply desire her.
anonymousIn some places on the internet they say that stative verbs like to feel to have to desire to look, to name only a few, cannot be modified by adverbs of manner that are normally formed by adding -ly to an adjective.
Is this true?
It's true only in a very approximate way. Don't expect that you'll never find exceptions to this "rule".
She felt strongly about veganism.
What we desire fervently we think about almost continually.
She continued to look devotedly at her husband but said nothing.
'have' is probably the best example of a verb that will follow this "rule".
CJ
Yes, but the adverb"deeply" is not formed from an adjective (there's no adjective form) which is what the OP was asking about.
"deep" is not an adjective?
CJ
Out of OP's topic, but I'm wondering, what does "She felt strongly about veganism." mean?
Does it mean that she strongly tended to be vegan or vegetarian?
Anonymous got himself into a bit of deep water, there.
No. It just means that she was strongly opinionated. She might think its the worst diet that anyone could ever follow, or that there are none better for a healthy long life.
For the record, that wasn't me.