Ordinary people get the grasp of these things within an hour or two, so you ...... (understand) the lot within minutes, Marcus.

Our lab assistant ...... (clean) the tubes this morning, but he was late for work so he didn't do anything at all, I guess.

The clairvoyant ...... (not / trouble) you with such silly thoughts.

The crazy maniac ...... (receive) medical treatment long ago, but he managed to escape from the instituation where he was supposed to be confined.

The witness ...... (tell) the judge the whole truth, but she chose not to mention some details about the accident.

Some of our football players ...... (practise) a lot more. Then, we wouldn't have failed so miserably.

The chimney sweeper ...... (sweep) the chimneys last month, but he had a terrible accident two months ago and he's still unable to walk.

If Mr Black had done all the research, he ...... (come) to the conclusion that the project shouldn't have been initialised in the first place.

If you had studied harder, you ...... (pass) your final exams, Marcus.

The electrician ...... (not / touch) the wire with his hands still wet.

David, really, you ...... (not / tell) your brother such a terrible thing.

You ...... (throw) the ungrateful tenant out of the flat long ago, Manfred.