過去分詞にsing
答sung
sing → sang → sung
過去分詞にknow
答known
know → knew → known
過去分詞にgive
答given
give → gave → given
現在完了の文にMy sister ( ) her room. (clean)
答has cleaned
完了の用法。has + cleaned
現在完了の文にI ( ) English for six years. (study)
答have studied
継続の用法。have + studied
現在完了の文にKen ( ) busy since yesterday. (be)
答has been
継続の用法。has + been
否定文にWe have washed the car.
答We have not washed the car.
have のうしろに not
否定文にHe has written the letter.
答He has not written the letter.
has のうしろに not
疑問文に→Yesで答えるYou have seen this movie before.
答Have you seen this movie before? ― Yes, I have.
Have を主語の前に。答えの主語は I
疑問文に→Yesで答えるShe has eaten natto once.
答Has she eaten natto once? ― Yes, she has.
Has を主語の前に。答えの主語は she