The structure 怎么…也…不… emphasizes that an action is performed diligently or for a long time. However, it is impossible to complete.
The verb, which expresses this action, is placed after both 怎么 and 也. The result of this action is placed after 不.
Scheme
怎么
verb
也
verb
不
complement
Examples
汉语太难学了,我怎么学也学不完
Chinese is so hard to learn. No matter how hard I study, I still can’t learn it
hànyǔ tài nán xué le, wǒ zěnme xué yě xuébuwán
鞋子太大,盒子太小,怎么放也放不进去
The shoes are too big, and the box is too small. No matter how hard I try to put them in, they won’t fit