简单的去厕所怎么说英语

To go to the bathroom in Engpsh, you can say "I need to use the bathroom" or "I need to go to the bathroom." You can also simply say "I need to go" or "I need to go pee/poo." If you want to be more specific, you can say "I need to go wash my hands" or "I need to go brush my teeth." These are all common ways to express the need to go to the bathroom in Engpsh.