热心网友
everadv.曾经, ever been 用于完成时态其完整形式是have ever been如，this is the most beautiful place i have ever been.这是我所到过的最美的地方。
热心网友
从来有e.g. Have you ever been to Australia? 你去过澳洲吗？ This is the most beautiful place i have ever been.这是我所到过的最美的地方。ever是语气助词。
热心网友
曾经.....例如曾经到过哪里：i have been to beijing.
热心网友
曾经（的状态，的事...)