YOU SAID:

the goose is in the oven then it exploded a duck

INTO JAPANESE

ガチョウがオーブンの中にいて、それからアヒルが爆発した

BACK INTO ENGLISH

The goose was in the oven and then the duck exploded

INTO JAPANESE

ガチョウがオーブンに入っていたらアヒルが爆発した

BACK INTO ENGLISH

The duck exploded when the goose was in the oven.

INTO JAPANESE

ガチョウがオーブンに入っているときにアヒルが爆発した。

BACK INTO ENGLISH

The duck exploded while the goose was in the oven.

INTO JAPANESE

ガチョウがオーブンに入っている間にアヒルが爆発した。

BACK INTO ENGLISH

The duck exploded while the goose was in the oven.