Whenever I wash my car, it seems to rain the next day.
It always rains the day after I wash my car.
ーWhenever I wash my car, it seems to rain the next day.
「車を洗うといつも次の日は雨になるようだ」
Whenever ..., it seems to ~ で「…するといつも、〜するようだ」
ーIt always rains the day after I wash my car.
「車を洗った次の日は、いつも雨が降る」
It always ... the day after ~ で「〜の次の日はいつも…だ」
ご参考まで！
カナダ 
