1. easy用作副词通常只用于某些特定的表达中。如：

Take it [things] easy. 别着急(慢慢来)。

Easy come, easy go. 来得容易去得快。

Easier said than done. 说来容易做来难。

2. easily 的用法则很广，除表示“容易地”、“轻而易举地”外， 还可表示“无疑地”、“可能地”，可用于动词之前或之后。如：

That can be done easily. 这很容易办到。

Some children learn languages easily. 有些孩子学语言很容易。

Our team was easily beaten. 我们轻而易举地被打败。

I can easily finish the work. 我可以毫不费力地完成这工作。

The window shuts easily. 窗子很容易就关上了。

They could easily get to do the typing. 他们可以很容易地找到另一个姑娘来打字。

She is easily the cleverest girl in the class. 她无疑是这个班最聪明的女孩。

A skilled worker can perform the task easily. 熟练工人做这项工作很容易。

I'm on a diet, since I put on weight easily. 由于我很容易长胖，我现在在节食。

Not only did he speak more correctly, but he spoke more easily. 他不仅说得更正确，而且讲得更不费劲了。