(1) не надо нужно тлько 8-15

cold - colder the coldest

small - smaller - the smallest

soft - softer - the softest

big - begger - the biggest

sad - sadder - the saddest

early - earlier - the earliest

young - younger - the youngest

clean - cleaner - the cleanest

cold         colder  coldest

small  smaller  smallest

soft          softer softest

big     bigger  biggest

sad         sadder    the saddest

early  earlier  earliest

young  younger  youngest

clean cleaner cleanest

https://englishmore.ru/verbs/formy-glagola-clean

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