解答

✨ 最佳解答 ✨

has/ have been + PP = Present Perfect Tense, Passive Voice: This is the same tense as above,but the Subject did not do the verb (=passive voice). " The man has been arrested. Now we are all safe." had + PP = Past Perfect: Something happened in the past before another past action. "

想當學霸

have/has+p.p.事情已被處理,不符合題意

想當學霸

have/has+Ving為現在完成進行

想當學霸

表示某事已進行一陣子了,目前仍為進行中 

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