Modal verbs
Had she insisted more firmly, the proposal __________ (might / accept), but she chose to remain diplomatic.
Had she insisted more firmly, the proposal MIGHT HAVE BEEN ACCEPTED, but she chose to remain diplomatic.
He behaved as though the outcome __________ (can / predict) all along.
He behaved as though the outcome COULD HAVE BEEN PREDICTED all along.
The witnesses testified that the minister __________ (not / be supposed) to attend the meeting, yet he appeared.
The witnesses testified that the minister WASN'T SUPPOSED to attend the meeting, yet he appeared.