(1) We were all surprised (to learn)
that our PE teacher has a degree
in economics.
「体育の先生」は our PE =(physical
education) teacher, 「経済学の学位」
はa degree in economics。主語は
we でよい。「皆」は all を副詞とする
か, all of us のように代名詞(主語)
としてもよい。「~に驚いた」はI
was surprised (to learn) that SV.
のように,不定詞句や驚きの理由·原
因を表すthat 節で書ける。go