Prostituto

No son tiempos, sino grados de los adjetivos: positivo (positive), comparativo (comparative) y superlativo (superlative). 

Te los doy en ese orden.

Adjetivos de una sola sílaba (cortos) queforman el comparativo añadiendo –er, y el superlativo -est

strong – stronger - strongest
tall – taller - tallest
late – later - latest
nice – nicer - nicest
short – shorter – shortest
great –greater – greatest

En estos tres, se dobla la consonante porque está precedida por una vocal corta:
sad –sadder - saddest
fat – fatter – fattest
big - bigger - biggest
thin – thinner - thinnestcheap – cheaper – cheapest
large – larger - largest
dirty – dirtier – dirtiest (cuando hay una consonante antes de la “y” se cambia por “i”)
ugly – uglier –ugliest (la misma regla anterior)Éstos también son de una sola sílaba, pero son irregulares, no siguen la regla anterior:

good – better - best
bad – worse - worst
late – latter - last
little – smaller –smallest (tamaño)
old –older –eldest (sólo para personas)
far – further - furthest (lugar y tiempo)
far – farther - farthest (lugar)

Adjetivos de más de una sílaba (largos):
appealing - more appealing - most appealingremarkable -more remarkable-most remarkable
beautiful - more beautiful - most beautiful
handsome – more handsome – most handsome
difficult - more difficult - most difficult
important - moreimportant - most important
insecure – more insecure – most insecure
expensive - more expensive - most expensive
comfortable – more comfortable – most comfortable
uncomfartable – more uncomfortable – mostuncomfortable
careful – more careful – most careful
interesting – more interesting- most interesting
ridiculous – more ridiculous – most ridiculous
elegant – more elegant – most elegant
selfish –more selfish – most selfish
generous – more generous – most generous
sensitive – more sensitive – most sensitive
sensible – more sensible – most sensible
humble – more humble – most humble...