Verb conjugation of "vorbeigehen" in German

As I have already mentioned in my last email, it is a breakthrough, I have never been so successful. I have visited several Spanish schools and would like to discuss that by telephone with you.
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.
Thank you for your feedback, I have little knowledge of the German language, and at the moment I have to use the dictionary a lot, and I read many articles from online newspapers and magazines.