下線部を代名詞にMr. Brown is from Canada.
答He is from Canada.
主格（Mr. Brown → he）
下線部を代名詞にMy classmates are on the volleyball team.
答They are on the volleyball team.
主格（my classmates → they）
下線部を代名詞にKen is in the brass band.
答He is in the brass band.
主格（Ken → he）
下線部を代名詞にWe meet Emi at the station.
答We meet her at the station.
目的格（Emi → her）
下線部を代名詞にPlease call Mr. Sato tonight.
答Please call him tonight.
目的格（Mr. Sato → him）
下線部を代名詞にI often help Ms. Green.
答I often help her.
目的格（Ms. Green → her）
下線部を代名詞にTom and Ken's room is very clean.
答Their room is very clean.
所有格（Tom and Ken's → their）
下線部を代名詞にI use my sister's computer sometimes.
答I use her computer sometimes.
所有格（my sister's → her）
下線部を代名詞にThat house is my parents'.
答That house is theirs.
所有代名詞（my parents' → theirs）
下線部を代名詞にThis computer is Yuki's.
答This computer is hers.
所有代名詞（Yuki's → hers）