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List of Adjectives that don't change to form Adverbs

Every English learner does not have the ear to hear if e.g 'fastly' sounds right or not. He/she must simply learn which adjectives do not change in form, if used as adverbs.

The textbook mostly lists just a few, such as: fast, hard, and straight.

But there are many more. I have been looking for lists in books, Internet since a long time. I have not really succeeded. So, please, list adjectives that do not change to form adverbs.

I can start off with:

fast
hard
straight
small
cool
ill
right
wrong

Rule: I think adjectives that end with the letter 'L' do not change. Coolly, illy, smally sounds awful.

Important: Make sure you let us know if you didn't agree with any listed adjectives/adverbs.

Thanks for every help, Jake
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Comments  
airmail, all day, all right, best, better, big, cheap, clean, clear, close, cold, daily, dead, dear, deep, direct, dirty, downtown, duty-free, early, easy, everyday, extra, fair, far, farther, fast, fine, firm, first, further, hard, high, home, hourly, inside, kindly, last, late, long, loud, low, monthly, outside, overseas, past, quick, quiet, right, sharp, slow, straight, sure, thin, thick, through, tight, weekly, well, wide, worse, wrong, yearly.

paco
Paco, thanks for posting but I don't agree with all of your examples.

cheap, cheaply is perfectly fine.
clean, cleanly is fine too.
clear, clearly is fine too.
close, closly is fine too.
cold, coldly is fine too. ?
dead, deadly is fine too.
deep, deeply is fine too.
direct, directly is fine too.
dirty, dirtily is fine too.
easy, easily is fine too.
firm, I'm not sure about 'firmly'. ?
firstly, secondly?
high, highly is fine. Highly creative.
loud, loudly is fine.
quick, quickly what's wrong with that. see fast/quickly
quiet, quietly is fine.
sharp, sharply is fine.
slow, slowly is fine.
sure, surely is fine.
tight, tightly is fine.
wide, widely is fine.

Jake
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Hello Jake

I picked up words (partial list of adjectives) that are used both as an adjective and as an adverb.
(EX) cheap : It is cheap. I bought it cheap
(EX) clean : This room is clean. She cut it clean.

Some of these adjectives might have an adverbial counter part of other form.
(EX) cheap - cheaply, clean - cleanly

paco
Hi Paco

Yes, there are some. I know of:

cheap, direct, loud, quick, slow, sure, wide. The choice of those is a matter of usage with ly forms ordinarly considered more formal, the shorter forme more empatic.

Are you sure the other ones have also two adverbial forms? E.g easy?

Jake

PS: One of my grammar books considers firstly as wrong. The spelling check in word, however, does not mark it.
In current English, "firstly" can be used with "secondly" and "thirdly" in listed statements. But careful writers prefer "first" even in this case.  

Of course, you can use adverb "easily". But "easy" and "easily" are a bit different in the usage. (EX) "Go easy!" "We'll win them easily."

paco
Students: We have free audio pronunciation exercises.
So there is a difference in usage?

Go slow, not go slowly.

Buy cheap and sell dear, the dresses were cheaply made. If you use an imperative you use the form without ly?

Thank you, Jake
Hello Jake
Swiss JakeSo there is a difference in usage?
Go slow, not go slowly.Buy cheap and sell dear, the dresses were cheaply made. If you use an imperative you use the form without ly?
No, I didn't mean all the pairs of "X" and "X-ly" have different meanings. I talked only about the pair of "easy" and "easily". Some pairs could have different meanings as the case of "easy" and "easily", but other pairs have no semantic difference as the case of "slow" and "slowly".

It doesn't matter whether the sentences is imperative or not. "Go easy" is just an idiomatic phrase to mean "use sparingly" or "do cautiously"

paco
Thank you Paco.

Jake
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