Answer Key
Exercise
You have already visited this section on 2015-02-23 at 6:15.
Fill in the missing modal verbs.
- They were taken aback to see me. They [must] have expected somebody else.
- People [ought, have, need] to be warned of the danger of swimming off this beach.
- Shhhh! Don't make so much noise! We [mustn't, shouldn't] wake the baby!
- It's not easy, I know. But it's getting better. And it [should] be fine next week.
- The TV is playing and there is mess on the table. Somebody [must] have been here before me.
- Yesterday I [had] to cram all day for my English final. I didn't get to sleep until after midnight.
- Why didn't you answer the phone? I let it ring more than 20 times! - - - I was having a shower, so I [might not, may not] have heard.
- You [should] have paid it all at once. You would have received a discount.
- I don't know where Carl is. He [may, might] have taken little Ben to the movies or the zoo.
- I [don't have, do not have] to go to work tomorrow because it is Memorial Day. The best thing about a day off from work is that I [don't have, do not have] to get up at 6, I can sleep until noon if I want to.