YOU SAID:

My cat died yesterday and I'm sad.

INTO JAPANESE

私の猫が昨日亡くなったし、私は悲しい。

BACK INTO ENGLISH

My cat died yesterday, I am sad.

INTO JAPANESE

私の猫は、私は悲しい昨日、死亡しました。

BACK INTO ENGLISH

I'm sad my cat has died yesterday.

INTO JAPANESE

私は私の猫が昨日死亡した悲しいです。

BACK INTO ENGLISH

My cat died yesterday I was sad.

INTO JAPANESE

私の猫が昨日死亡した私は悲しかった。

BACK INTO ENGLISH

My cat died yesterday and I was so sad.

INTO JAPANESE

私の猫が昨日亡くなったし、とても悲しかった。

BACK INTO ENGLISH

My cat died yesterday and was very sad.

INTO JAPANESE

私の猫が昨日死んだととても悲しくなりました。

BACK INTO ENGLISH

My cat died yesterday and was very sad.