"Loud" and "loudly": how to use them? [duplicate]

• Which one should I use?

  1. Play music loud

  2. Play music loudly

     • I think "play music loudly" is right but "play music loud" is used more. Please tell me your opinion and the reason why you choose it. Thank you so much.

     • Maybe my grammar is wrong 'cause I'm not good at English

Solution 1:

Normally, adjectives are turned into adverbs by adding the -ly suffix to them.

But some words are used as both adjectives and adverbs, with no discernable difference in their form. For example,

1. I like fast cars. [adjective]

2. He drove fast. [adverb]

3. They played a clean game. [adjective]

4. They played clean. [adverb]

"Loud" is an example of a word that can be used as both an adjective and an adverb. For example, people say:

5. I like loud music. [adjective]
6. I play music loud. [adverb]

If you look at this google books search, you'll see plenty example of it being used as an adverb. Further, Oxford Dictionaries even lists it as an adverb.

But some people also use the clearly adverbial form "loudly", as in

7. I play music loudly. [adverb]

In conclusion, both "loud" and "loudly" can be used as adverbs. The choice is yours.