YOU SAID:

i like walking to work when it isn't raining.

INTO JAPANESE

雨が降ってないときを動作するように歩くが好き。

BACK INTO ENGLISH

I like walking to work when it was not raining.

INTO JAPANESE

雨は降っていなかったときを動作するように歩くが好き。

BACK INTO ENGLISH

I like walking to work when it was not raining.