YOU SAID:

I have to do my homework but it's so hard to concentrate on a stupid book

INTO JAPANESE

私は宿題をしなければならないが、愚かな本に集中するのはとても難しい

BACK INTO ENGLISH

I have to do my homework, but it is very difficult to concentrate on a foolish book

INTO JAPANESE

私は宿題をしなければならないが、愚かな本に集中することは非常に難しい

BACK INTO ENGLISH

I have to do my homework, but it is very difficult to concentrate on stupid books

INTO JAPANESE

私は宿題をしなければならないが、愚かな本に集中することは非常に難しい

BACK INTO ENGLISH

I have to do my homework, but it is very difficult to concentrate on stupid books