Modal Perfect Continuous: Must Have Been Doing (C2)

She fell asleep at her desk before 6 p.m. yesterday — she ___ all night on the bid document.

The walls are still tacky and the team are just packing up brushes now — they ___ all morning.

The kitchen is a complete disaster zone — flour everywhere, six mixing bowls in the sink. She ___ all afternoon.

His eyes are red and he's yawned three times since I sat down — he ___ on this report for hours.

You're absolutely drenched from head to toe — you ___ in the rain for ages.

I tried calling every twenty minutes and got the engaged tone each time — they ___ to someone all evening.

When I walked in, the workshop was strewn with tools and half-finished pieces — the carpenters ___ when they were suddenly called away.

The oven is still warm and the whole house smells of cinnamon and apples — she ___ all morning.

He knew precisely when we left, when we came back and who visited — he ___ the house for days.

Their inboxes are completely untouched and the boardroom door has been shut since nine — they ___ in there all day.

Bookmarks all over the table, four empty coffee cups, three open laptops — she ___ for days on this case.

The queue along the pavement this morning stretched halfway round the block — people ___ since dawn for those tickets.

His sight-reading has come on extraordinarily in just one summer — he ___ every single day at his grandmother's place.

Her hands are caked in soil and her neck is bright pink with sunburn — she ___ in the allotment since breakfast.

They returned to base completely exhausted and empty-handed — they ___ in the dense forest for hours.