"will you come up to my flat?" asked the spider t

"will you come up to my flat?" asked the spider to the fly.这是什么句式呀

一种全倒装句式。
正常：
The spider asked the fly, "Will you come up to my flat?"
又如：
“Yes, I will " answered the fly.
但这是主语是名词才能用的。
"Don't say so," he said.

这是一个倒装句，正常句子为：the spider asked “will you (come up) to my flat?” to the fly. 也就是说：的确有ask sth to sb这种结构，意思是“向某人问某事”。