Be calm or you'll make a wrong decision.
→ If you are not calm, you will make a wrong decision.

It is compulsory for them to study music and dancing every week.
→ They must study music and dancing every week.

Jane didn't go fishing yesterday because it rained heavily.
→ Because of the heavy rain, Jane didn't go fishing yesterday.

Van Cao composed Viet Nam's national anthem Tien Quan Ca.
→ Van Cao is the composer of Viet Nam's national anthem Tien Quan Ca.

His idea is different from mine.
→ His idea is not the same as mine.

These Dong Ho paintings are more expensive than those modern paintings.
→ Those modern paintings are not as expensive as these Dong Ho paintings.

What is your favorite food?
→ What food do you like best?

Which do you prefer, pop music or rock music?
→ Which do you like better, pop music or rock music?