一个英语问题...have和had

问题描述:

一个英语问题...have和had
I had a bad cold .还是 I have a bad cold .
一般,过去分词,过去式的用法,区别.[列举几个句子,

I had a bad cold.我之前感冒了.(现在已经好了.)
I have a bad cold.我感冒了.