Question

【题目】I think friends need to be different.(改为否定句)
I friends need to be different.

Answer 1

【答案】don't；think
【解析】句意：我认为朋友不必不同。主句中谓语动词是think，believe等时，否定从句时要在形式上否定主句。所以答案是don't think。