YOU SAID:

I will go to pick up some flowers for my roommate because it is her birthday

INTO JAPANESE

彼女の誕生日だから、私のルームメイトのいくつかの花を拾うに行きます

BACK INTO ENGLISH

Go pick some flowers for my roommate from her birthday

INTO JAPANESE

彼女の誕生日から私のルームメイトのために花を選んで行く

BACK INTO ENGLISH

I choose flowers for my roommate from her birthday

INTO JAPANESE

私は彼女の誕生日から私のルームメイトの花を選ぶ

BACK INTO ENGLISH

I choose flowers of my roommate from her birthday

INTO JAPANESE

私は彼女の誕生日から私のルームメイトの花を選ぶ

BACK INTO ENGLISH

I choose flowers of my roommate from her birthday