Question

she is not so beautiful as her sister change to comparative degree​

Answer 1

$\huge\bold{\underline\purple{Answer}}$

She is not more beautiful than her sister

Answer 2

⠀⠀⠀⠀$\huge {\fcolorbox{lime}{black}{\pink{sᴏʟᴜᴛɪᴏɴ\checkmark}}}$

$\large {\pink {\underline {\bf {ǫᴜᴇsᴛɪᴏɴ :-}}}}$

She is not so beautiful as her sister.

Change into comparative.

$\large {\pink {\underline {\bf {ᴀɴsᴡᴇʀ :-}}}}$

Her sister is more beautiful than her.

$\\ \\ \\ \\ \\ \small {\pink {\underline {\bf {ᴛʜᴀɴǫ}}}}$