two weeks ago

• 两周前

two weeks ago的用法和样例：

例句

1. I buy two exercise-book two weeks ago, but I haven't buy any since.
   两周以前我买了两本练习本，但后来就再没买过练习本。
2. He left home two weeks ago and we haven't heard from him since.
   他两星期以前离开了家，到现在我们一直没有他的消息。