Modals of speculation (past time)

Passengers .......... scared!

• must have been

• must has been

• might have was

• couldn't have be

I think the planes .... very low to avoid radar signals.

• must have fly

• might have flew

• may have flown

• can't has flown

Nixon might have ...... under a lot of pressure!

• be

• were

• been

• to be

The police couldn't ..... done more to uncover the mystery behind this tragedy.

• to have

• to had

• had

• have

Kennedy's family must ..... a lot of pain.

• have suffered

• has suffered

• have suffer

• suffered

This ..... have been yesterday's paper!

• must to

• must

• must have

• musted

The world ...... about how this happen for at least four months.

• can't had wondered

• might have wonders

• might have wondered

• must has wondered

The star wars fans ..... that he was not a good candidate for that role.

• must had thought

• must have think

• might have thought

• may have think

He........... a lot fun that night!

• might has had

• can't have have

• must have have

• must have had

She ...... a lot to get there! You need to work hard to be successful.

• couldn't have struggle

• must have struggled

• must has struggled

• should have sruggle