I caught a cold 我感冒了。
感冒catch a cold caught是catch的过去式
I caught a cold last week and have been in bed ever since.
I caught a cold yesterday,I must see a doctor.
A:Why are you here?You're supposed to be in school.
B:I caught a cold so I didn't go to school.
小野丽莎-Les Feuilles Mortes