Why I think of hope is always so difficult

Why I think of hope is always so difficult -Science is so difficult!-I think you should keep why is BBC so difficult to understand? why is GRE so difficult to memory? why is so difficult to manage marriage? difficult,i,chinese,think,is I think the work is kind of difficult.改为同义句 I think the work Why the result is always so. I think it is right.why do not you think so ——Science is so difficult!——I think you should keep on___har I think that English is not so difficult as math.为什么不用否定转移? I think doing chores is not so difficult这句话对么?需要用否定前移么?