The private investigator saw John ...... (enter) the abandoned building. A few minutes later, the investigator decided to follow him.

I saw Lilly ...... (laugh) at a hilarious joke and I couldn't help thinking that she looked even more gorgeous than ever before. Then, a moment or two later, she was solemn again.

Henry must have seen me ...... (park) my car in the backyard and ...... (come) in the house. Still, he didn't have any free time, and so he didn't drop by.

When the old hag from across the street opened her front door, she saw a young couple ...... (go) by her lawn.

As David leant back a little, he could see his colleagues ...... (argue) about some topic or other.

When the secret agent looked out of the window, he saw a number of cyclists ...... (ride) in front of the suspect's house.

The artist watched the amateur painter ...... (complete) the picture and could not help but wonder how skillfully she mastered her role.

The hungry dingo watched his pray ...... (crawl) out of the small hole, waiting patiently for the right time to make his move.

Some parents need to watch their children ...... (do) their homework otherwise they will not finish it.

The wife watched her husband ...... (play) golf for just a couple of minutes when she suddenly fell asleep.

We watched the President ...... (speak) on television for a minute or two when suddenly the TV set broke down.

The angry manager watched his assistant ...... (present) the latest figures for a few moments when he suddenly shouted at him loudly.

The children must have heard their parents ...... (speak) about the military school because they knew every single detail of their parents' talk.

My sensitive friend probably heard me ...... (say) all those nasty things about her because she's been avoiding me for quite a while now.

All my friends have heard me ...... (play) at the National Concert Hall in the capital.

The girl heard her grandmother ...... (sing) a few lines when she burst into a fit of laughter.

When my best friend heard me ...... (practise) the piano last week, she told me to find another instrument. It only took her five minutes to figure out that I suck.

The teachers heard a student ...... (revise) for his final exams and were surprised at how much he remembered.

If I want to get admitted to Harvard University, it means ...... (cram) a lot of difficult stuff.

Getting the hang of chemistry will mean ...... (study) all night long for a few years.

Should you really be interested in joining our club, it'll mean ...... (have) to pass a test of courage.

I really don't think the teacher means ...... (fail) us in maths.

I suppose the dean means ...... (reorganise) the whole staff based on the lastest quality feedback.

I didn't mean ...... (offend) you, I merely spoke my mind.

Charles, who's always been eager to get my job, means ...... (fight) me over the next project.