fly的第三人称单数为flies。当flies作名词时，意思为(舞台上方)悬吊布景的空间，吊景区，当flies作动词时，意思为飞;飞翔;(在空中或宇宙)飞行，航行;(乘飞行器或航天器)航行。

Noun:

(theater) the space over the stage (out of view of the audience) used to store scenery (drop curtains)。

用作名词 (n.)

They were driven to distraction by the flies.

他们被苍蝇搅得烦透了。

How can I get rid of the flies in the kitchen?

我怎样才能消灭厨房里的苍蝇?