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Hard although he tried He tried hard although However hard he tried As he tried hard
should have tried must have tried might have tried needn’t have tried
Louis Braille tried; he announced did Louis Braille try; he announced Louis Braille had tried; did he announce had Louis Braille tried; had he announced
will try has tried had tried is trying
has tried had tried has been trying had been trying
was tried tried tired was tired
had tried；must be tried；must be try；should be had tried；be
hard as he tried as hard he tried hard he was tried tried hard as he
was trying is tried is trying was tried
tried; managed managed; tried tried; tried managed; managed
as he tried hard as hard he tried so hard did he try hard as he tried
be tried was tried should try tried
had tried, must be tried, must be try, should be had tried, be
be tried was tried should try tried
hard as he tried as hard he tried hard he has tried tried hard as he
Hard although he tried He tried hard although However hard he tried As he tried hard
try; managed succeed; tried manage; tried succeed; managed
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