Verb conjugation of "rumble" in English

Regarding the meeting in early May: I could not reschedule the appointment at my daughter's doctor and I will definitely know if I can come during the first 2 weeks. I guess we should talk next week.
The conjugations of verbs are the biggest problem for me. I have never studied Spanish in school, but visited evening classes instead. This year I want to take a full Spanish course.
Absolutely no problem, do you speak English? I'll help you to learn it and you will like it. Your English is really very good, I understand all your lyrics, and please accept my friends request.