過去分詞にteach
答taught
teach → taught → taught
過去分詞にread
答read
read → read → read
過去分詞にbuild
答built
build → built → built
過去分詞にtake
答taken
take → took → taken
受動態にMy grandmother cooked this soup.
答This soup was cooked by my grandmother.
was + cooked + by ~
受動態にThe team won the game.
答The game was won by the team.
was + won + by ~
受動態にKen wrote this letter.
答This letter was written by Ken.
was + written + by ~
否定文にThese cookies were made by my mother.
答These cookies were not made by my mother.
were のうしろに not
否定文にThis class was taught by Mr. Sato.
答This class was not taught by Mr. Sato.
was のうしろに not
疑問文に→Yesで答えるThese books were read by many people.
答Were these books read by many people? ― Yes, they were.
Were を主語の前に。答えの主語は they