可以放句末，例如：

1、Some drugs are being used on a much larger scale than previously.与以前相比，某些药物的使用范围更广了。

2、Previously she had very little time to work in her own garden.以前，她没什么时间打理自己的花园。

3、The building had previously been used as a hotel.这座楼房早先曾用作旅馆。