这些句子为什么都要加be动词?如题》》Japan is to the east of China.My books are in my bag.
问题描述：
这些句子为什么都要加be动词?
如题》》
Japan is to the east of China.
My books are in my bag.
答
系动词,系表结构,
要不你想加啥呢
主谓宾