How do you use the words. Another, else and other?

You use anoter with a singular noun, or a number+ plural noun.

EX: I've got another pen. or I've got another two pens.

You use another, not other, to mean "an extra....." or "more".

EX: I'd like another drink, please.

NOT I'd like other drink,please.

You use others as a pronoun, but not as an adjective.

Ex:Some birds sing but others don't.

NOT Some birds sing but others birds don't.

Else can mean "other" or "more" after words like somebody/ someone/ something/somewhere/anybody/anyone/anything/everybody/everyone etc......

Else mean 'more' after the words like who/what/why/when/where/how/whatever etc...

EX: Do you need anything else? (= do you need anything more?) or Why can't you behave like everybody else?