Here are some adverbs that are often used with or without -ly. We have a long tradition of using the form without -ly in speaking and writing. Go slow! There's some ice in the road.
Originally Posted by ridal
I prefer the use of these adverbs with -ly on exams for reasons I've discussed. In my judgment, louder / more loudly and loudest / most loudly are interchangeable.
loud / loudly ..... louder or more loudly ..... loudest or most loudlyBadly is an adverb that surprises because it goes from badly to worse. The form is badly, worse, worst. To feel bad is to not feel well, but here bad is an adjective. To feel badly is to be unable to feel successfully, perhaps because your fingers are broken and bandaged. Many people say, I feel badly about that, thinking they are using really good grammar. This is a hypercorrect error. The actual correct form is, I feel bad about that.
quick / quickly ..... quicker or more quickly ..... etc.
slow / slowly
High as an adverb differs from highly in an important way. High means way up, often when it modifies a verb, such as in, the boy flew the kite very high or the eagle was perched high overhead. Highly means very, often when it modifies an adjective, such as in his behavior was highly irregular, or the car was highly customized. Here higher and highest fit high; more highly and most highly fit highly.
As you get to know your dictionary, it will become an inseparable, trusted companion and friend, one you can depend on every day.