If I had a lot of money, I would travel around the world.
correct
If she were taller, she would play basketball.
correct
If we lived near the sea, we would go swimming every day.
correct
If he studied harder, he would pass the exam.
correct
If they won the lottery, they would buy a big house.
correct
If I would have a car, I would drive to school.
incorrect
If we had a robot, it will do our homework.
icorrect
If he meets an alien, he would be very scared.
icorrect
