YOU SAID:

Eli has a girlfriend because he is hot.

INTO JAPANESE

エリは暑いのでガールフレンドがいます。

BACK INTO ENGLISH

Eri is hot so she has a girlfriend.

INTO JAPANESE

エリは暑いので彼女がいます。

BACK INTO ENGLISH

Eri is hot so she is here.

INTO JAPANESE

エリは暑いのでここにいます。

BACK INTO ENGLISH

Eri is here because it's hot.

INTO JAPANESE

暑いのでエリが来ました。

BACK INTO ENGLISH

Eri came because it was hot.

INTO JAPANESE

暑かったのでエリが来ました。

BACK INTO ENGLISH

Eri came because it was hot.