English Skills 10th Edition by John Langan, Zoe Albright

Exercise 6

For each of the italicized verbs, fill 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
After completing the activity, compare answers with a partner.
EXAMPLE
My uncle likes to give away certain things. He (a) gives old, threadbare clothes to the Salvation Army. Last year he (b) gave me a worthless television set whose picture tube was burned out. He has (c) given away stuff that a junk dealer would reject.
The government plans to give citizens more tax credits in order to encourage energy savings. It already (a) ____________ a $3,000 credit to those who buy hybrid vehicles. Last year, it (b) __________ my uncle a tax credit for installing solar panels on his house, and it (c) ________ him money the year before to help pay for the cost of replacement windows.