Written in letter form, informal format
Writen in first person
Salutation is 'dear' +name
Complimentary close "yours sincerely
Date of writing the invitation is given
Sender's Address appears on the left hand side
Various tenses used to suit the sense
B. Â Social Function
Asking or requesting some one to go to a place do something or participate in certain event.
C. Â Language features
Formal Invitation using present tense informal using various tenses.