The comparative form of "forth" is "further," and the superlative form is "furthest." These forms are used to compare the degree or extent to which something is done or exists in relation to others. In this case, "forth" is being compared to other distances or extents.
The comparative is greater and the superlative is greatest.
"Bit" is a noun and a verb and, as such, does not have a comparative or superlative form.
comparative straighter and the superlative the straightest
Comparative - cuter Superlative - cutest
Comparative - better Superlative - best
comparative : purer superlative : purest
Comparative: older Superlative: oldest
Dative; Early Comparative; Earlier Superlative; Earliest
The comparative and superlativeforms of grand are: Comparative: grander Superlative: grandest
comparative - merrier superlative - merriest
comparative = sadder superlative = saddest
Comparative: shallower Superlative: shallowest
The comparative is "stricter" and the superlative is "strictest".
The comparative is greater and the superlative is greatest.
Comparative: Whiter Superlative: Whitest
"Bit" is a noun and a verb and, as such, does not have a comparative or superlative form.
Luckier, luckiest. Luckily doesn't have comparative and superlative forms but the comparative and superlative of lucky are as above.