Algunos adverbios tienen la misma forma que el adjetivo correspondiente, por ejemplo: long, far, little, much, straight, low, fast, hard.
Algunos adverbios tienen dos formas – una que coincide con el adjetivo correspondiente, y otra que termina en -ly. Las dos formas generalmente tienen el mismo significado:
The ship arrived safe(ly).
She bought it cheap(ly).
Con los siguientes adverbios, las dos formas tienen significados diferentes:
hard – con esfuerzo, mucho hardly – apenas
late – tarde lately – recientemente
near – cerca nearly – casi
short – corto shortly – pronto
pretty – bastante prettily – hermosamente
Adjetivo Adverbio Adverbio con terminación -ly
This pencil is hard. She studies hard. He can hardly move.
It was late autumn. She came home late. He has not been well lately.
She is pretty. It is pretty dark. They were prettily dressed.