Правильно написанно(граматика) и укажите где исправить hi! i received your letter! i was glad of hearing from you as well! thanks for your invitation. but i am compelled to upset you, i can't go with you on concert. the matter is that my parents are going to go to the cinema and i will be compelled to nurse my little brother. on the next week i wiil be free
and we can go on another concert. thanks for understanding! well will have fine.
Hi!
I have got your letter! I was glad to hear from you again! Thank you for your invitation. But I am compelled to upset you, I can't go with you to the concert because of my parents who are going to the cinema at the same time and I have to stay with my little brother. Next week I wiil be free and we will be able go to another concert. Thanks for understanding!
Yours,
Nina