你讲话吧 You talk

听老师讲课吧 Listen to the teacher ; Listening to the teacher lectures

还是讲英语吧 English is spoken ; Or speak English it ; They speak English

讲中文吧 Speak Chinese

我讲德语吧 I speak German

讲讲道理吧 Please be reasonable

以后我们讲英文吧 After we speak English ; We speak English

是讲玩笑吧 joke

讲笑话呢吧 joke