How glad they were to see each other again in Shanghai!为什么be动词后面可以加to
问题描述：
How glad they were to see each other again in Shanghai!
为什么be动词后面可以加to
答
正常的语序是
they were glad to see each other again in shanghai!
how 表示强调，感叹句
答
倒装拉
答
这句话主句是感叹句how glad they were！我想如果把这句话转换一下陈述形式你就该明白了——they were very happy to see each other again in shanghai. （他们能再次在上海见到对方多么高兴啊！）
此外，be后面是可以加to的，但是也许你们还没学到，be to表示即将发生的事，这里不是，如果还没学到就别多去看了，可能会对你的理解和做题造成困扰。
答
How glad they were to see each other again in Shanghai!
be动词后面加to 表将来时态。此句表过去将来。
解答满意吧。
答
they were so glad to see each other again in shanghai.这句话改成陈述句就是这样的.
they 主语
were 谓语
so glad 表语
to 后面的是 补足语,以补充说明为什么事情而高兴.这可以是to be 结构也可以是 ing 动名词结构.