Comparative is more expensive.
Superlative is most expensive
Pork is more expensive than chicken. But Beef is the most expensive.
Cost is a noun or a verb, it doesn't have a comparative form. Were you thinking of costly? Comparative: costlier Superlative: costliest.
The positive degree is costly; the superlative degree is costliest.
more expensive most expensive
costliest
costlier
costlier
more costly
The superlative form of clean is "cleanest".
comparative - merrier superlative - merriest
the superlative form of sad is SADDEST
Longest is the superlative.
No, the superlative form is "gentlest."
most cost-efficient
most cost-efficient
The superlative form of "movingly" is "most movingly."
The superlative form of clean is "cleanest".
The superlative form of clean is "cleanest".
The superlative form of ancient is ancientosity
comparative - merrier superlative - merriest
The superlative form of the word "genuine" is "most genuine."
"Older" is the comparative form of old. The superlative form is oldest.
"Poke" is a verb and a noun and, as such, does not have a superlative form.
Teach is a verb and so has no superlative form.
the superlative form of sad is SADDEST