Question

Could you please correct my mistakes.

You've described a warm friend who's cooling off.

You've- subject
described- verb
a- adjective
warm- adjective
friend- direct object
who's- who: direct object/ is: verb
cooling- verb
off- preposition

Corrected:

You - subject
've described- verb
a- adjective
warm- adjective
friend- direct object
who's- who: direct object/ is: verb
cooling- participle (verbal adjective) modifying "who"
off- preposition used in a "phrasal verb" situation: http://grammar.ccc.commnet.edu/grammar/verbs.htm#phrasal

=)

You've is a contraction of You and have.

looking for simple subects. we spentmost of the day picking berries in the woods.