△ If I’m busy I don’t go.
I don’t go if/when I’m busy.
△ When I have “kaisen-don” I don’t feel full.
I don’t feel full when I have “kaisen-don”.
Japanese: reason/condition → result
English: result → reason/condition
Who Verb What How Where When Why
when (why) where how (who) what
(???) Yesterday was raining because shopping go not.
I didn’t go shopping yesterday because it was raining.
Or, It was raining yesterday so I didn't go shopping.