The big box is too heavy for me to carry,后面为什么不加it

The big box is too heavy for me to carry,后面为什么不加it the big box is too heavy for me to carry.为什么不加it 初中英语句子the box is too heavy for the child to carry,句末为什么不加it 英语困惑The box is too heavy for me to carry(it) 这后面到底要不要it?It's 1 The box is too heavy for me to carry the box is too heavy for me to A carry it away B lift it up It is too heavy a box fer me to carry 为什么 too heavy a box 不是 the box is too heavy to carry后面要不要加it The box is too heavy for me to carry.(改为同义句).The box is not the love is too heavy for me to carry it The box is too heavy for the girl to carry － This box is too heavy for me to carry it upstairs.