这句话有没有语法错误?Could you tell me what do you use it for and how
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could you tell me 引出的句子是宾语从句,从句要用主谓宾语序,或者说是陈述语序(只要主句是疑问语序就可以了,从句不需要);而且for what一般不分家,要写在一起;还有,这一句话主句是问句,所以句尾要用问号.也就是说,最起码这个句子应该是:Could you tell me for what you use it and how many you actually need,so that i could introduce some more suitable styles and quote the best prices?