YOU SAID:

I took the subway and i left my phone on the seat because it was really slow

INTO JAPANESE

私は地下鉄を取り、それは本当に遅いので席に自分の携帯電話を残しました

BACK INTO ENGLISH

It is really slow so I took the subway seats left on my phone

INTO JAPANESE

それは本当に遅いので、私は自分の携帯電話に残した地下鉄の座席を取った

BACK INTO ENGLISH

It's really slow, so I took the seat on the subway left on his cell phone

INTO JAPANESE

私は彼の携帯電話に地下鉄の左の席を取ったので、それは本当に遅い

BACK INTO ENGLISH

I took the seat left of the underground on his cell phone, so it is really slow

INTO JAPANESE

私は座席を取った地下の彼の携帯電話に残された、それは本当に遅い

BACK INTO ENGLISH

I was left in the basement took a seat to his cell phone, it is really slow

INTO JAPANESE

私で残っていた地下室は、彼の携帯電話に席を取った、それは本当に遅い

BACK INTO ENGLISH

The basement left by me took a seat to his cell phone, it is really slow

INTO JAPANESE

私が残した地下室は自分の携帯電話に座っていた、それは本当に遅い

BACK INTO ENGLISH

The basement I left was sitting on my cell phone, it was really slow

INTO JAPANESE

私が残した地下室は私の携帯電話に座っていた、それは本当に遅かった

BACK INTO ENGLISH

The basement I left was sitting on my cell phone, it was really late

INTO JAPANESE

私が残した地下室は私の携帯電話に座っていた、それは本当に遅かった

BACK INTO ENGLISH

The basement I left was sitting on my cell phone, it was really late