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will finish has finished finished would finish
What do you think has happened to Tom What do you think Tom has happened Do you think what has happened to Tom Do you think what Tom has happened
to study study studying studied
for him studying him studying for him to study him to study
if Tom doesn’t have if Tom has unless Tom doesn’t have unless Tom hasn’t
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will be working has been working worked will have worked
many; much much; many fewer; less more; less
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studied Tom did Tom study does Tom study studies Tom
better worse faster further
studied Tom did Tom study does Tom studay studies Tom
has died died has been dead is died
speak Speaking spoken to speak
the, / /, / /, the the, the
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