Correcting Sentences

Their life have changed.

The farmers harvest the crops last month.

My sister is jealousy of our new baby sister.

His brave saved all the children from the fire.

He cannot see anything because she's blind.

The sky are very clear and blue.

The construction of the new building have caused disturbance all day.

My dog digged the ground yesterday.

People in Mongolia are called Mongolian.

An apple is a dairy product.