Usage of TO MEAN, MEANS, MEANING Hi. I was wondering if anybody could help me proofread the sentences bellow? Are the sentences correct? "What a pain", is an expression TO MEAN how annoying or how frustrating something is. "What a pain", is an expression THAT MEANS how annoying or how frustrating something is. "What a pain", is an expression MEANING how annoying or how frustrating something is. Thank you!