I don't think ……整个句子是肯定句还是否定句?

I don't think ……整个句子是肯定句还是否定句? I don't think he will come 改否定句 i think he can speak English的否定句为什么是I don't think he can spe I don 't know .改为肯定句 把I You They He变成肯定句 和否定句 例如；I watch TV .I don't watch TV. please句的否定句是前面加don’t还是后面加don’t I don't have any books.（否定句）= I have no books.（肯定句）肯定句的概念是什么 don,t you love me ,回答 yes,i do.是肯定还是否定,求补习语法 do you think 否定怎么回答?是用I think not .还是 I don't think so. I think he is at home.改为否定句.为什么一定要改成I don't think he is at h i think he needs some help .改成否定句.哪个对i don't think he needs don't have to 是肯定还是否定?