YOU SAID:

this is some big problems

INTO JAPANESE

これはいくつかの大きな問題です

BACK INTO ENGLISH

This is some big problem

INTO JAPANESE

これは大きな問題です

BACK INTO ENGLISH

This is a big problem

INTO JAPANESE

大きな問題

BACK INTO ENGLISH

is a Big problem

INTO JAPANESE

大きな問題

BACK INTO ENGLISH

is a Big problem