English Skills with Readings 8th Edition by John Langan

تمرين 35

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 like to freeze Hershey bars. A Hershey bar (a)________ in half an hour. Once I (b)__________ a bottle of Pepsi. I put it in the freezer to chill and then forgot about it. Later I opened the freezer and discovered that it had (c)__________ and exploded.