两者均可表示“便宜地”、“廉价地”，但前者主要与表示“买”(如buy, get, pick up等)或“卖”(如sell)之类的动词连用，且置于其后；后者用法较广，可置于动词之前或之后。如：

He sold it cheap [cheaply]. 他卖得很便宜。

The radio was cheaply bought [was bought cheap]. 这收音机买得很便宜。

The room was cheaply furnished. 屋里配置了便宜的家具。

The bus takes you there cheaply. 坐公共汽车去便宜。

We mustn't sell our goods so cheaply. 我们的货不应该这样便宜地卖。

I got them quite cheaply. 它们我买得很便宜。

There you can play golf comparatively cheaply. 在那里打高尔夫球比较便宜。

They told us where to shop cheaply. 他们告诉我们在哪里买东西便宜。

Such vaccine can be mass-produced cheaply. 这种疫苗可以便宜地大批生产。