副词确实可以修饰be动词，以下是一些例句：

He is really tired.

强调他非常疲惫。

She is absolutely right.

加强她的正确性。

He is always getting up late.

描述他经常晚起的行为。

You are totally correct.

强调他是完全正确的。

He is highly thought of by his boss.

描述他在老板心目中的地位很高。

I am greatly interested in the novel.

表达他对小说的浓厚兴趣。

You must always wait in a queue.

强调你必须排队。

这些例句展示了副词在修饰be动词时的不同用法和位置。希望这些例子能帮助你更好地理解副词修饰be动词的用法。