Question

what a pity it is that you didn't arrive by daylight.这个句子是什么句式?

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Answer 1

what a pity it is that you didn't arrive by daylight.
意思是：
你未能白天到达十分可惜。
这个句子是主语从句+表语从句：
what a pity it is 主语从句；that you didn't arrive by daylight.表语从句。