下線部を代名詞にMy brother is very kind to us.
答He is very kind to us.
主格（my brother → he）
下線部を代名詞にKate and Emi are busy every day.
答They are busy every day.
主格（Kate and Emi → they）
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Everyone likes my classmates.
答Everyone likes them.
目的格（my classmates → them）
下線部を代名詞にI play tennis with Ken.
答I play tennis with him.
目的格（Ken → him）
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Mr. Sato's house is near my school.
答His house is near my school.
所有格（Mr. Sato's → his）
下線部を代名詞にDo you know Ms. Green's phone number?
答Do you know her phone number?
所有格（Ms. Green's → her）
下線部を代名詞にThese books are Tom and Ken's.
答These books are theirs.
所有代名詞（Tom and Ken's → theirs）
下線部を代名詞にIs this umbrella my sister's?
答Is this umbrella hers?
所有代名詞（my sister's → hers）