The key to exercise solutions in chapter 1c - Grammar in use for the textbook On Screen B1+ - Student's Book with authors Virginia Evans and Jenny Dooley from Express Publishing
Question
Read the email. Is it formal or informal? Give reasons.
Identify the verb forms (1-10) in bold. Match them to the uses (A-J).
Answer
It is informal because it uses short forms (e.g. I haven't written), everyday language (e.g. Thanks for), and short sentences (e.g. I've got to go now).