are加动词ing是进行时。
例句：
Are you vegetarian?
你只吃素食吗？
Sales are booming.
销售量在激增。
扩展资料
We are very sad to hear that you are leaving.
听说你要走了，我们十分难过。
Here are two records that are bubbling under.
这两张唱片将会走红。
What are you doing? Are you out of your mind?
你在干什么？你疯了吗？
