某英語の先生から習った話
"Further investigation is necessary for {us/you/...} to learn more about it."
は次のように表せる．
"Further investigation is necessary to learn more about it."
また．
"Further investigation is needed by {us/you/...} to learn more about it."
は次のように表せる．
"Further investigation is needed to learn more about it."
さらに，分詞構文やto不定詞を使った句
"Generally speaking, ", "Judging from ～,"
は付帯状況のwithを使って，
"With us generally speaking, ", "With us judging from ～,"
のように表せる．
