Tony worked in a lawyer's office years ago.为什么years前面不用加介词?好像It has belonged to our family for a long time.
问题描述：
Tony worked in a lawyer's office years ago.
为什么years前面不用加介词?
好像It has belonged to our family for a long time.
答
years ago前省略了for。
答
上句式一般过去时，不用介词
下句是现在完成时，要用介词
答
这里years ago是表示数年前
固定的