PAST MODALS and EXPRESSING ABILTY

modals of past : it _____been incredibly difficult for them to sail across the ocean in such terrible weather.

complete with ability expressions : I don’t think I’d be____of jumping out of a plane.

deduction:The drowned men were not from the area, so they _____ realized how dangerous the river can be.

pick one: Surely they must know / have known what they were doing was dangerous.

Choose one: He can’t / might not have gone shopping. His wallet is here in his coat pocket.

expressing ability : She was swept out to sea and we ______ save her.

choose one: She may not have / not had noticed the water coming in.

pick one: I guess one possible explanation is that he must / might have lost his map.

Choose one: We don’t know for sure what happened. She might / must have lost her way.

choose one: It’s such a long distance. She can’t / must have walked it all in one day!

Pick one: Reports suggest that the explosion might / must have been caused by fireworks but no one knows for sure.

expressing ability: The boat sank, but we _____ to swim to the shore.

Choose one option: It’s possible that she might / must have slipped

expressing ability Despite all the problems, they _____reaching the top of the mountain