I think it is a great fun.改错)

问题描述:

I think it is a great fun.改错)

把a 去掉,因为fun是不可数名词

I think it is so funny.
可以把fun(名词)换成funny(形容词)

把is去掉
it 在这里作形式宾语,前面有think作谓语动词,再加is就不对了

I think it has a great fun.

去掉a,因为fun是不可数名词.