previously能放句末吗（previously可以单独作状语吗）

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。

previously意思是先前，在此之前，一般放在句首作时间状语