Tips that helped me: * Ask him if you prefer to finish his sentences or that you can try to finish them. I always chose 'people can finish my sentences' because of how severe my speech is * Tell him that you will wait and don't mind that he is taking is time until he finishes his sentence * you could ask regularly: "I see, so you mean 'suming up'. Did I get it right?' * you can be the initiater in the conversation. Because I chose to be passively waiting until the other person maintains the conversation. Ask him if he likes it that you make new topics to talk about * ask: did you finish your sentence or not yet? *