Verb conjugation of "alter" in English

It looks like we need to invite Erika again to my home, once the cake is ready. Of course, this should be done before Sunday to stay in the chocolate cake race. We should buy cream too.
I grew up in Angola, but now I'm in Hanover, not far from your border town. I used to study at the university in Boston, Massachusetts. I have graduated from MIT, which is the technology institute.
I have made an internship at a law office, but just for two months. Their salary is really bad. Now to my promise to correct your long message. You need to say: 'On Friday' not 'At Friday'.