Irregular forms of comparatives & superlatives:

adjective          comparative          superlative

good                better than              the best

bad                   worse than              the worst

little                 less than                  the least

far                    farther than             the farthest

many               more than                the most

much               more than                the most

old                    older / elder            the oldest / the eldest

late                   later / latter             the latest / the last

near                  nearer                       the nearest / the next

Examples:

That restaurant has the best steak I’ve ever tasted.  You should go there with a friend and order the filet mignon.

I did worse on the test than all of my classmates!  I wish I had studied harder.

It’s farther from your parents house to the airport than from mine, so you should sleep over and I’ll take you to the airport tomorrow morning.