He likes tea better than coffee.
He prefers tea to coffee.
[prefer A to B = like A better than B]
The flowers will die if you don't water them every day.
Water the flowers every day,or(否则) they will die
I'm sorry that Ididn't do well in the exam.
I'm sorry for not doing well in the exam.
[介词for 后面接现在分词结构]