在英语中，表达考试不好的几种常见方式包括：

I did poorly on the English exam.

I didn't do well on the English exam.

I did badly on the test.

I failed the exam.

I feel very sad that I failed the exam.

这些表达都可以传达出你在英语考试中表现不佳的意思。根据具体的语境和情感色彩，你可以选择最适合的一种来表达。例如，如果你只是想简单地陈述一个事实，可以使用“I did poorly on the English exam.”或“I didn't do well on the English exam.”。如果你想要表达失望或难过的情绪，可以使用“I feel very sad that I failed the exam.”。