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mustn’t have broken mightn’t have broken shouldn’t have broken couldn’t have broken
Who has Has who Who Had who
shut; is will shut; has been are shutting; was have shut; has been
wouldn’t have broken hadn’t broken hasn’t broken didn’t break
broke; did is broken; has broken is broken; did has been broken; has broken
find out find look look for
find out find look look for
are breaking have broken were broken will break
breaks broke is broken was broken
would break broke would have broken had broken
shut; is will shut; has been are shutting; was have shut; has
broke has broken will break was breaking
would break broke would have broken had broken
is to blame is to be blamed will blame blames
Guess how Who knows So What What for
are shutting; was shut; is have shut; has will shut; has been
is broken was broken has broken breaks