(a) They attend classes regularly.
(b) I go to Jaipur with my friends.
(b) Did you see my book?
(a) Close the door. (Order)
(b) Please submit my form. (Request)
(a) Oh, could I be there!
(b) How nicely he plays!
(c) Alas, he is no more !
(d) Hurrah! You won the race!