为什么be worried about 前面要加be呢 而worry about就不要

be worried about造句 be worried about sth. be worried about中worried为什么是过去分词的?为什么不是过去式也要加ed? be worried about 的意思 为什么be worried about 前面要加be呢 而worry about就不要 请教一道完形填空题 有关worry 这个词He was ( )that his children would be upset.worried 为什么?不是be worried about worried that 不是缺少about care about 与 be worried about区别 be worried doing sth 还是be worried about doing sth be worried about 和 be worried of区别 worry是一个动词,但为什么常用be worried about而不用worry about worry about ,be worried about ,be concened about的区别 英语The mother is always worried about her son's health.为什么那个是worried不应该是be always doing Danny is worried about his Chinese为什么不是be+Ving吗 为什么这里用 worried worried是worry的过去式吗 be worried about是什么短语啊? Don't be worried about it.对吗? 区分be worried about和be worrying about be worried about和be excited about有什么区别 there is nothing to worry about这句话后面为什么不能换成 to be worried?