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have gone has gone have been has been
must be should have been might have been can’t be
has left has been away from have left have been away from
couldn’t can mustn’t may not
could have left must have left could leave might leave
will teach would have taught has been teaching will have been teaching
should have missed must have caught must have missed might miss
was were has been have been
has left has been away from have left have been away from
They’re exhausted! You must be joking! I’m not surprised! They are really tired of it!
couldn’t can mustn’t may not
Was were has been have been
to be leaving to have been leaving to have left to have been left
went has gone have been has been
is was should be has been
held up put up taken up given up
couldn't can't mustn't may not
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