YOU SAID:

If you don't wear a sweater you'll catch a death of cold.

INTO JAPANESE

セーターを着ていないと、ひどい風邪をひいてしまいます。

BACK INTO ENGLISH

If I don't wear a sweater, I'll catch a bad cold.

INTO JAPANESE

セーターを着ないとひどい風邪をひいてしまいます。

BACK INTO ENGLISH

If I don't wear a sweater, I'll catch a bad cold.