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he must to teach a class he will be teaching a class he will teach a class he will have teaching a class
will teach would teach has taught will be teaching
You，he，I.；us I.，you，he；us you，I.，he ；you He，you，I.；us
as a result of for the sake of with respect to on account of
knows know have known am to know
will teach would teach has taught will be teaching
they, me them, me them, I their, my
for middle class young adults to stay with their parents for young adults to leave their parents and live independently for married young adults to move back home after a lengthy absence for young adults to get jobs nearby in order to live with their parents
were taught taught teach are taught
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