remain to be down 的意思他的主语一般是sth吗?

remain to be down 的意思他的主语一般是sth吗? be/keep/remain calm 和 calm sb.down的区别 remain to be 用法 remain to be settled remain doing和remain to do区别remain to do 和 remain to be done呢 several things remain to be be/keep/remain calm 和 calm sb.down的区别 知道的 remain seated和remain to be seated有什么不同 remain to be done和remain seated 区别. remain seated和remain to be seated有什么不同 remain stuck 和remain to be stuck有什么区别. 为什么是remain to be seen 而不是remain to see不是 remain to do remain to be seen为什么等于appear/seem to be remain to be done是否等于remain doing?need doing是否等于need to be done? be down to need to be down there remain some problems to be solved中的remain可以用be代换吗 there are so many problems remaining to be settled.这里的remain是系动词还是不及物动词如果remain是系动词,