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must have killed can have killed should have killed might have killed
need have been avoided must have been avoided might have been avoided will have been avoided
should have killed might have killed must have killed may have killed
the murderer was an aristocrat. the murderer’s DNA has been found. the murderer was a famous man. the murderer has not been caught
to kill to have killed having killing have been killed
might have been could have been may have would be
by sinking his boat. in a car accident. on the night 30 years after the murder. by jumping into the English Channel.
might be killed might have been killed may be killed may been killed
to kill to have killed having killed have been killing
may as well have finished might as well finish may well have finished might well finish
had escaped but was killed later was involved in a murder in France. was caught in another country. met his partners on a ferry.
must have been mustn't have been couldn't have been might have been
have killed had killed have been killed had been killed
If he went Were he gone Should he have gone Had he gone
to kill to have killed having killed have been killing
might have could be have been shall be
would have killed might have been killed should have been killed must have killed
disclosed. set up. took on. changed.
If he went Were he gone Should he have gone Had he gone
would be must be might have been should have been