Verb conjugation of "thwart" in English

Yes, I speak a little bit of English. I'm just beginning to take English courses in private evening classes. Is your Spanish good? I will speak to you in Spanish and you teach me in English.
Was that all? I was sure that I had a lot more mistakes, because I did not know how to express myself properly. Maybe I am a natural born talent. I am just kidding. Let me know if you need something else.
Actually, the East Coast is six hours behind CET, that means that I would speak on midnight at your 6 o'clock dinner. We should try written exercise first because of the huge time difference.