YOU SAID:

It is very hot outside, maybe we should stay indoors

INTO JAPANESE

外はとても暑いので、屋内にいるべきかもしれません

BACK INTO ENGLISH

It's very hot outside so maybe you should stay indoors

INTO JAPANESE

外はとても暑いので、屋内にいる必要があるかもしれません

BACK INTO ENGLISH

It's so hot outside that you may need to stay indoors

INTO JAPANESE

外はとても暑いので、屋内にいる必要があるかもしれません

BACK INTO ENGLISH

It's so hot outside that you may need to stay indoors