Answer: a. The boy is speaking the truth.
b. Mr.Cooper has been speaking about Dinosaurs.
c. The boat sails.
d. Amy will be going to school
e. The baby has been crying for hours.
f. Robert has been eating all the cookies.
g. I had finished my assignment.
h. Mr.Bert had been teaching for five years.
i. Dev will be seeing the Prime Minister.
j. Priya shall have finished her stitching by then.
k. I met the principal today
l. It began to rain. Boys were making a loud noise.
n. Girls were sitting in the room
o. He is writing a letter.
p. We went to bed very early