YOU SAID:

my mother is quite scared

INTO JAPANESE

私の母はかなり怖がって

BACK INTO ENGLISH

My mother was quite scared.

INTO JAPANESE

私の母は、かなり怖がっていた。

BACK INTO ENGLISH

My mother was pretty scared.

INTO JAPANESE

私の母は、かなり怖がっていた。

BACK INTO ENGLISH

My mother was pretty scared.