Modal verbs +perfect infinitive

The speaker is certain that it is was True.

• Must

• Might

• Could

• May

The speaker thinks that it is was possibly True.

• Must

• Might May could be

He must have been in the sea.

• Speak about the past

• Speak about the present

He must be English.

• Situation in the past

• Situation in the present

The glass might be broken.

• True

• False

The man can't have said about His love.

• True

• False

Paul can't have sat on the beach because Bostwana is 100 miles from the sea.

• True

• False

The speaker is certain that it isn't True.

• Mustn't

• Can't