 If you would like to make a comment or insert a remark in an on-going conversation, it is polite to acknowledge what someone has just said before stating your own ideas. Some phrases for doing this are... That's interesting. That's interesting. Interesting point. Interesting point. Hmm, I hadn't thought of that before. Hmm, I hadn't thought of that before. Questions can also be a useful way of bringing new ideas into a conversation. What do you think about? What do you think about? Have you considered? Have you considered? What about? What about? Sometimes a more direct approach is appropriate. Can I add something here? Can I add something here? Do you mind if I interject something here? Do you mind if I interject something here?