The following words may be used both as adjectives and adverbs. Some examples are given below; for more detailed information, check in a good dictionary.
Fast
Modern man leads a fast life. (Here the adjective fast modifies the noun life.)
He drove the car fast. (Here the adverb fast modifies the verb drove.)
Half
Each of us has half ownership in the property. (Here the adjective half modifies the noun ownership.)
She was half crying, half laughing. (Here the adverb half modifies the verbs crying and laughing.)
She is half Spanish, half French. (Here the adverb half modifies the adjectives Spanish and French.)
Straight
Don’t expect to get a straight answer from her. (Here the adjective straight modifies the noun answer.)
She went straight home. (Here the adverb straight modifies the verb went.)
Just
The train just left. (Adverb)
He arrived just in time. (Adverb)
God is just. (Adjective)
Late
The meeting is scheduled for late evening. (Adjective)
He arrived late. (Adverb)
She worked late. (Adverb)
Low
We are low on supplies. (Adjective)
Her voice was low. (Adjective)
She turned the gas down low. (Adverb)
The helicopter flew low over the trees. (Adverb)
Most
This is the most expensive gadget I have bought. (Adverb)
Most people enjoy playing with kids. (Adjective)
Clear
They moved clear across the country. (Adverb)
She has a clear complexion. (Adjective)
Clean
He is very clean in his habits. (Adjective)
We want to play the game clean. (Adverb)
Read more at http://www.englishpractice.com/improve/words-adjectives-adverbs/#qyqfvJPhDSwq6GJf.99
