describe后面可以接wh-从句，但不接that-从句。如：

describe how

It’s difficult to describe how I feel. 很难形容我的感受。

Could you describe how the trip ended? 你能描述一下旅行是怎么结束的吗？

describe what

The man described what he had seen. 那个男子描述了他看见的情况。

Please describe what happened next. 请描述一下后来发生的事。

describe who

Please describe who did the best in the experiment. 请描述一下谁在实验中做得最好。

Using a mirror in the classroom, describe who is looking at whom. 使用教室里的一面镜子，描述一下是谁在看谁。

describe where

These words are used to describe where people lived when they were children. 这些词用于描述人们儿时生活过的地方。

describe when

Please describe when you first saw a snake. 请描述一下你第一次看到蛇的时候。

describe why

Please describe why your plan is the best. 请描述为什么您的计划是最好的。