My Grammar and I (Or Should That Be 'Me'?): Old-School Ways to Sharpen Your English

S
HAKESPEARE
, The Rape of Lucrece
Let’s reciprocate
The reciprocal pronouns are each  other  and  one  another.  Each  other  refers  to
two people or things; one another to more than two.
The two candidates who were still in contention congratulated each  other.  The
others adjourned to the bar to commiserate with one another .
What’s mine is yours
The possessive pronouns are my , mine , your(s) , his , her(s) , our(s) , their(s)
and its (and note that they never – repeat never – need an apostrophe: see
here
for  some  common  confusions).  Mine  ,  yours  ,  his  ,  hers  ,  ours  ,  theirs  and  its
tend to be used after the noun to which they refer and mean ‘the thing belonging
to or associated with me/you/whoever’:
He had forgotten his gloves again, so I gave him mine .
Put that book back where you found it: it isn’t yours .
We were madly envious because their house was much nicer than ours .