下線部を代名詞にMs. Green is busy every day.
答She is busy every day.
主格（Ms. Green → she）
下線部を代名詞にTom and Ken are from Canada.
答They are from Canada.
主格（Tom and Ken → they）
下線部を代名詞にMy sister is on the volleyball team.
答She is on the volleyball team.
主格（my sister → she）
下線部を代名詞にI play tennis with my parents.
答I play tennis with them.
目的格（my parents → them）
下線部を代名詞にWe meet Yuki at the station.
答We meet her at the station.
目的格（Yuki → her）
下線部を代名詞にPlease call my brother tonight.
答Please call him tonight.
目的格（my brother → him）
下線部を代名詞にDo you know Kate and Emi's phone number?
答Do you know their phone number?
所有格（Kate and Emi's → their）
下線部を代名詞にMr. Brown's room is very clean.
答His room is very clean.
所有格（Mr. Brown's → his）
下線部を代名詞にIs this umbrella my classmates'?
答Is this umbrella theirs?
所有代名詞（my classmates' → theirs）
下線部を代名詞にThat house is Ken's.
答That house is his.
所有代名詞（Ken's → his）