"恐怕"用来说一件你担心会发生的事，意思差不多是"可能"，但常常有不好的感觉。

"恐怕" is used to talk about something you worry might happen, similar to "probably," but often with a negative feeling.

比如天很黑的时候，你可以说："恐怕要下雨了。"

For example, when the sky is very dark, you can say: "恐怕 it's going to rain."