***NOT A TEACHER***Xianyu, the plural (blueS) is correct. People use the singular in a sentence such as: I'm feeling blue today. Thank you.羡鱼-Xianyu;554533 said:I've got the blues today.
Should blues be blue, right? Thanks.
If you have a question about the English language and would like to ask one of our many English teachers and language experts, please click the button below to let us know: