I think Chinese is as a difficult language as English 哪里错了

She spend 50yuan for an Englisn-Chinese Dictionary .有哪里错了

第二个在she,spend,,an,dictionary,上改错

应该是I think Chinese is a language as difficult as English
as ..as..结构中间用形容词~
PAY FOR 是固定搭配。但是PAY不可以跟钱数搭配。
SPEND some money on sth~
所以She spend 50yuan on an Englisn-Chinese Dictionary

I think Chinese is a language as difficult as English. She spent 50 yuan on one English-Chinese dictionary.

我来回答第一个问题。as...as 是个短语。中间可以加上形容词等，意思是与.....一样，如as tall as . he is as tall as me .

I think Chinese is a language as difficult as English. She spent 50yuan for an English-Chinese Dictionary.