YOU SAID:
I went to the store to get donuts
INTO JAPANESE
私はドーナツをもらうために店に行きました
BACK INTO ENGLISH
I went to the store to get a donut
INTO JAPANESE
ドーナツを買いに店に行きました
BACK INTO ENGLISH
I went to the shop to buy donuts
INTO JAPANESE
ドーナツを買いに店に行きました
BACK INTO ENGLISH
I went to the shop to buy donuts
You've done this before, haven't you.