The school rule states that no child shall be, unless by an adult, allowed out of the school during the day.
-Why are your eyes so red? You __________ have slept well last night.-Yeah, I stayed up late writing a report.
Harry is feeling uncomfortable. He __________ too much at the party last night.
When I was a child, I __________ watch TV whenever I wanted to.
Since nobody gave him any help, he __________ have done the research on his own.
The children __________ lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.