Verb conjugation of "grate" in English

Please take into account, that on May 10 and 11 there are holidays in the United States and that we do not work on Saturday. This will leave only the 15th, 16th and 17th for a company visit.
Thank you for your email! A little question about yourself. How old are you? I think the Americans are using the word color and not colour, but I understand if you are not sure about it.
I wish you lots of fun and success in your French class, and a nice weekend with lots of snow. PS: I am so happy I found you, my Italian friend, because we can visit each other all the time now.