準備をする・備える

Prepare/Prepare for
Get ready/Get ready for

The teacher prepares a test.

The student prepares for a test.

I have to prepare dinner.

I have to get dinner ready

I have to prepare for lunch time.

I have to get ready for lunch time.

 

...の準備をする(実際にそのものを準備･作業にとりかかる)

prepare ....

get...ready

...に向かって準備をする(それに向けた準備･備える)

prepare for.....

get ready for...