请分析一下句子结构This letter has to be written again.
问题描述:
请分析一下句子结构This letter has to be written again.
为什么要加个be
答
被动语态 be动词+过去分词
请分析一下句子结构This letter has to be written again.
为什么要加个be
被动语态 be动词+过去分词