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Past Modal Verbs - Coggle Diagram
Past Modal Verbs
Present
Past obligation
Had to
Uso simple past
Example
Can-could
May-might
Will-would
Past
Modal verb + have + past participle
Example
should- should have eaten
Use for regret
Verbs
Must have
Almost certain something is true
Might/ could/may have
Think it is possible that something is true
Couldn´t/ can't have
Almost certain something is not true
Third conditional
Past unreal situation
Example
Would have sent