YOU SAID:

I went to school yesterday but the bus was so crowded I couldn't get in, so I had to wait for the next and that's why I was late to school

INTO JAPANESE

昨日学校に行ったのですがバスが混んでいて乗れませんでしたので次を待たなくてはいけませんでした

BACK INTO ENGLISH

I went to school yesterday, but the bus was so crowded that I couldn't get on, so I had to wait for the next one.

INTO JAPANESE

昨日学校に行きましたが、バスが混んでいて乗れなかったので、次のバスを待たなければなりませんでした。

BACK INTO ENGLISH

I went to school yesterday, but the bus was so crowded that I couldn't get on, so I had to wait for the next bus.

INTO JAPANESE

昨日学校に行きましたが、バスが混んでいて乗れなかったので、次のバスを待たなければなりませんでした。

BACK INTO ENGLISH

I went to school yesterday, but the bus was so crowded that I couldn't get on, so I had to wait for the next bus.