短文改错...只解释为什么把work 改成working.还有为什么把secret改成副词,还有为什么consider改

短文改错...只解释为什么把work 改成working.还有为什么把secret改成副词,还有为什么consider改成ing
My father is an engineer work in a big company.He is
such busy that he sometimes has to stay up late .Apart from this,
he hardly has any times to take exercise .He has been in poor
health for some time.My mother and I are worried that he may
fall ill if he works too hard.These days I'm thinking why to
develop his interest in playing sports.Considered that today is
Father's Day ,I decided buy a pair of jogging shoes for him.I
seret put them on the desk in his study .When my father entered
into his study this evening ,he looked surprised ,but he immediately
realized my intention.He promised that he go jogging every evening.