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have tried tried was trying had tried
were；were have been；have been have been；were were；have been
have been;have been have been;were were;have been were;were
hard hardly almost nearly
have learned three thousand learned three thousand of had learned three thousands learned thousands of
would I make have I made I did make shall I make
are achieving achieved have achieved had achieved
to have killed to kill to have been killed to be killed
to make to have made made making
have worked had worked worked was worked
have worked work worked are working
Thousands of Two thousands Thousand of Two thousand of
to have killed to kill to have been killed to be killed
I have stayed here for twenty years ago. I stayed here for twenty years Twenty years has passed Twenty years have past.
have come across I I have come across have I come across had I come across
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