Writing 1 Decide whether these extracts from letters or emails are formal or informal. Write F for formal or I for informal. 1 You can come and stay with me if you like. You're always welcome. 2 My husband and I request your presence at our charity dinner. 3 I am writing to inform you of the time changes for the ballet classes. 4 Sorry I haven't written for ages but I had so much studying to do. 5 I can't wait to see you in the summer. ___ 6 I must apologise for this unfortunate matter.. 7 Alibek and I are going rafting in July and wondered if you wanted to come. 8 I am writing to complain about your son's unfortunate behaviour during the guitar lessons.​