insist persevere persist

堅持

---

insist  個人意見的堅持

    I didn't want to go, but she insisted.

   She insisted that I (should) go.

    The source for my story insisted that I not reveal his/her name.

---

persevere  努力不懈堅持
                     沒有受詞 ， Vi

    She persevered in her studies and graduated near the top of her class.

    Even though he was tired, he persevered and finished the race.

---

persist   1.有人不喜歡，反對的堅持；
               2.一段不舒服的時間持續
               沒有受詞 ， Vi

1.
    The reporter persisted with his questioning.

    If you persist with this behavior, you will be punished.

 2.
    If the pain persists, see a doctor.

    Doubts about the defendant's story have persisted for some time now.

    Rumors persist that they are dating.