The cotton is much heavier than before the cotton into the river.这个句子语法对吗?

问题描述:

The cotton is much heavier than before the cotton into the river.这个句子语法对吗?

The cotton is much heavier than that out of the river.我的那个句子对吗?比较级than后面有问题。before the cotton into the river 这是一个介宾短语,不能充当than的宾语。