It is significant that girls generally do better in examinations than boys.
很明顯，女生的考試成績一般比男生的好。
I think I will do better in English this term.
我想本學期我的英語會學得好點。
They think he'll do better in another class.
他們認為他在另一班會比較好。
He will do better in his studies if he works hard.
如果他更用功些，他會學的更好。
I'm sure we'll do better in times to come.
我相信將來我們會干得更好。