previous(previous同义词)

是before：

prep. 在……之前，先于；在……面前；面对（法院、法庭或其他官方机关）并受审；（宁愿……）不愿

conj. 在……以前；到……为止；以免，不然；（宁可……而）不愿Several soldiers went before to scout.

数名士兵在前面探路。

He was never late before.

过去他从不迟到。

Pride comes before a fall.

骄必败。

He sat just before me.

他就坐在我的前面。

He will die before he shall disgrace himself.

他宁肯死而决不受侮辱。