YOU SAID:

when i might go then he will fall

INTO JAPANESE

私が行くかもしれないとき彼は落ちるでしょう

BACK INTO ENGLISH

He will fall when i may go

INTO JAPANESE

私が行くかもしれないときに彼は落ちるでしょう

BACK INTO ENGLISH

He will fall when I may go

INTO JAPANESE

私が行くかもしれないときに彼は落ちるでしょう

BACK INTO ENGLISH

He will fall when I may go