過去分詞にbuy
答bought
buy → bought → bought
過去分詞にsend
答sent
send → sent → sent
過去分詞にhold
答held
hold → held → held
現在完了の文にShe ( ) natto once. （eat）
答has eaten
経験の用法。has ＋ eaten
現在完了の文にWe ( ) the car. （wash）
答have washed
完了の用法。have ＋ washed
現在完了の文にHe ( ) the letter. （write）
答has written
完了の用法。has ＋ written
否定文にMy father has worked here for twenty years.
答My father has not worked here for twenty years.
has のうしろに not
否定文にI have lost my key.
答I have not lost my key.
have のうしろに not
疑問文に→Yesで答えるThey have played the game many times.
答Have they played the game many times? ― Yes, they have.
Have を主語の前に。答えの主語は they
疑問文に→Yesで答えるShe has taught us math for two years.
答Has she taught us math for two years? ― Yes, she has.
Has を主語の前に。答えの主語は she