Verb conjugation of "stir" in English

My boss offered it to me, so that a few more people at work will have a good level of English and now I really have to kick my own ass (I've started last year and it's not going very well).
You have to be careful when you go on summer vacation. There are many dangers but the most dangerous one is the sun itself, because if you're not careful it may harm you. People underestimate the rays.
Well, now that we're friends, I am very happy to send you images. I would be happy if we can keep the contact for a long time. May I ask a questions: is Emily your real name or just an avatar name?