English Skills with Readings 8th Edition by John Langan

تمرين 10

For each of the italicized verbs, fi ll in the three missing forms in the following order:
(a) Present tense, which takes an -s ending when the subject is he, she, it, or any one person or thing (see pages 459 460)
(b) Past tense
(c) Past participle the form that goes with the helping verb have, has, or had
I would like to see a UFO. I spend hours looking at the night sky, hoping to (a ) __________ one. A neighbor of ours claims he (b) __________ one last month. But he says he has (c) __________ the Abominable Snowman, too.