It's OK if you have more than one class on a Friday, otherwise I would suggest "I suppose we will have no English class on Friday or "..not have an English class on Friday." If you mean this is to be a regular occurrence I would suggest ".....will have no English class(es) on Fridays / ...not have an English class (English classes) on Fridays"
What specifically about the sentence puzzles you, englishamateur? And what are you trying to say? We aren't supposed to proofread your sentence for you, but if you tell us what you're specifically wondering about, we'll do our best to help.