過去分詞にgive
答given
give → gave → given
過去分詞にsee
答seen
see → saw → seen
過去分詞にbuy
答bought
buy → bought → bought
現在完了の文にShe ( ) us math for two years. (teach)
答has taught
継続の用法。has + taught
現在完了の文にI ( ) in this town for ten years. (live)
答have lived
継続の用法。have + lived
現在完了の文にShe ( ) him since 2020. (know)
答has known
継続の用法。has + known
否定文にThey have finished their homework.
答They have not finished their homework.
have のうしろに not
否定文にMy sister has cleaned her room.
答My sister has not cleaned her room.
has のうしろに not
疑問文に→Yesで答えるWe have visited Kyoto three times.
答Have we visited Kyoto three times? ― Yes, we have.
Have を主語の前に。答えの主語は we
疑問文に→Yesで答えるHe has read this book twice.
答Has he read this book twice? ― Yes, he has.
Has を主語の前に。答えの主語は he