A monkey live in rainforest.
{A monkey} is the third singular, so please add an -s at the end of {live}.
A monkey lives in a rainforest.

He love to eat grape.
{He} is the third singular, so please add an -s at the end of {love}.
Also, {grape} is a countable noun, so remember to use plural form here.
He loves to eat grapes.

He hate grapefruit.
{He} is the third singular, so please add an -s at the end of {hate}.
He hates grapefruit.

He can’t expression fruit this word.
{Expression} is a noun.
He can’t express this word FRUIT.

It is a winter day.
Ok!

The monkey is quivering.
Ok!

He is bewildered.
Ok!

He is miserable.
Ok!

He said solemnly to himsely. “If I don’t find a warm place, I will die.”
Watch your spelling!
He said solemnly to himself, “If I don’t find a warm place, I will die.”

He find a celery.
Ok!

He eat the celery.
{He} is the third singular, so please add an -s at the end of {eat}.
He eats the celery.

He die.
{He} is the third singular, so please add an -s at the end of {die}.
He dies.

The celery is unpalatable.
Ok!