YOU SAID:

I was about to have lunch when my sandwich was eaten by a whale.

INTO JAPANESE

私のサンドイッチが鯨に食べられたとき昼ご飯にするだった

BACK INTO ENGLISH

To have lunch when my sandwich was eaten by the whale was

INTO JAPANESE

私のサンドイッチが鯨に食べられたときランチでした。

BACK INTO ENGLISH

Lunch was when my sandwich was eaten by the whale.

INTO JAPANESE

ランチは、私のサンドイッチは、鯨に食べられたときだった。

BACK INTO ENGLISH

Lunch and my sandwich was when eaten by the whale.

INTO JAPANESE

ランチと私のサンドイッチ、鯨に食べられる頃。

BACK INTO ENGLISH

When I eat lunch and my sandwich with the whale.

INTO JAPANESE

ランチと鯨のサンドイッチが食べるときは.

BACK INTO ENGLISH

When you eat a lunch of sandwiches.

INTO JAPANESE

サンドイッチのランチを食べるとき.

BACK INTO ENGLISH

When you eat a sandwich for lunch.

INTO JAPANESE

ランチのサンドイッチを食べるとき。

BACK INTO ENGLISH

When you eat a sandwich for lunch.