Is it farther or further?

Farther is for distance. Further also means more: for further information.

No. Nice is short, so nicer. Use more with longer adjectives: more interesting.

Grammar, compared

Comparatives and superlatives

The comparative compares two things: taller. The superlative picks the top of a group: the tallest.

Comparative / Superlative
Comparative	Superlative
My flat is bigger than yours.	It is the biggest flat in the building.
This test is more difficult than the last.	It is the most difficult test of the year.
She works harder than me.	She works the hardest.

Comparatives and superlatives
Adjective	Comparative	Superlative
Short: tall	taller	the tallest
Ends in -e: nice	nicer	the nicest
One vowel and one consonant: big	bigger	the biggest
Two syllables ending in -y: happy	happier	the happiest
Long: expensive	more expensive	the most expensive
Irregular: good, bad, far	better, worse, farther	the best, the worst, the farthest

To say two things are equal, use as plus the adjective plus as: as tall as. To say less, use not as ... as or less.

Do not use more with a short adjective: taller, not more tall.
Say than, not that: bigger than me. Más grande que is bigger than.
Add the before a superlative: the biggest.
After a superlative, use in for a group or place (in the class) and of for a plural (of all).

Is it farther or further?: Farther is for distance. Further also means more: for further information.
Can I say more nice?: No. Nice is short, so nicer. Use more with longer adjectives: more interesting.

Book a trial class. She writes back with times in Buenos Aires time.