请分析这两个英文句子有什么不对？为什么？

改正：

1.The more we old ，the more aspects that we should touch.

可能是你没有掌握好词之间的顺序。

2.I think borrowing book is better than buying book.

"I think……"这种句式后面应该直接加句子。
“borrow book is better than buy book”不是句子哦！
“borrow”是动词，动词开头的句子应该加ing或改为to borrow。

the older we get, the more we learn.

i think to borrow is better than to buy a book.

1 第一个 old 的比较级是 older, 不是 more old

2 借书 泛指所有书 应该是books