英语翻译啊啊啊啊

4. "Where did the time go?" People would say that when searching their menmories.
5. You have no idea how happy I am to see you.
6. I believe you would win the match after all.
7. I wonder whether you understand what I say or not.
8. He asked me that girl's number.
9. Mom would frequenly ask me how to use QQ.

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4.回首过往岁月，人们感叹时间去哪儿了？
Looking back the past years, people sigh time where did you go?
5.你知道能再见到你我有多么高兴么？
Do you know to see you again how happy I am?
6.我相信你一定会赢得这场比赛。
I believe you will win the game.
7.我想知道你们是否明白我所说的话。
I want to know whether you understand what I said.
8.他问我那个女孩的电话是多少。
He asked me what is the girl's phone.
9.妈妈经常问我该如何使用QQ。
My mother often ask me how to use QQ.