n
Sounds like "n" as in "no".
nǐ
you
你
nánbian
south
南边
f
Sounds like "f" as in "far".
fǎ
law
法
fànfǎ
break the law
犯法
an
Sounds like "a" as in "palm" + "n" as in "no".
nán
difficult
难
nián
year
年
en
Sounds similar to "en" as in "often" or "un" as in "sun", but slightly different.
mén
door
门
miànfěn
flour
面粉
Single-syllable audio courtesy of the AllSet Learning Chinese Pronunciation Wiki, used with permission.
HSK word audio courtesy of Audio-cmn. (CC BY-SA 3.0)