intwoyears是什么時態

　　例句：

　　He trebled his earnings in two years.

　　他在兩年間收入增加了兩倍。

　　She completed her degree in two years.

　　她在兩年內修完了學位。

　　It was his fourth pink slip in two years.

　　這是他在兩年內收到的第四份解雇通知書。