YOU SAID:

I a i n t e v e r s e e n t w o p r e t t y b e s t f r i e n d s

INTO JAPANESE

私は2人のかなりの親友を見ていません

BACK INTO ENGLISH

I haven't seen two pretty best friends

INTO JAPANESE

私は2人のかなりの親友を見たことがありません

BACK INTO ENGLISH

I have never seen two pretty best friends

INTO JAPANESE

私は2人のかなりの親友を見たことがありません

BACK INTO ENGLISH

I have never seen two pretty best friends