Put the verbs in the following sentences in the present perfect tense or past tense, paying particular attention to aspect.
1. My father asked me once a week if I (date) was dating anyone, and once a week I told him no.
2. Those pop bottles of yours (collect) have been collecting dust for weeks. Have been collecting
3. Since the 1980 election, viewers (hear) have heard about the born-again fundamentalist vote.
4. Last winter he (pay) paid $43,000 for an ad in The Washington Post.
5. In 1992 the alternative health centers (serve) served more than 125,000 women.
6. In the past month, Rumsfeld (order) has ordered military commanders to clarify the rules.
7. All 1,200 Concord High School students (cheer) were cheering the launch when a teacher asked them to be silent.
8. Lately, she (dig) has been digging into her family background to learn more about two of her great-grandfathers.
9. This power struggle between the two of us (brew) has been brewing for years. ‘brewed' is possible here.
10. In 1790, Dr. Joseph Guillotine (invent) invented the beheading machine named after him.
- In the sentence in (3), "have been hearing" is also possible.
- In the sentence in (8), strictly speaking, "has dug" is also possible.
- In the sentences in (9), "brewed" is also possible.