YOU SAID:
I don't understand what just happened
INTO JAPANESE
何が起こったを理解していません。
BACK INTO ENGLISH
What has happened does not understand.
INTO JAPANESE
何が起こったは理解していません。
BACK INTO ENGLISH
What has happened is not understood.
INTO JAPANESE
何が起こったかはわからない。
BACK INTO ENGLISH
I don't know what happened.
INTO JAPANESE
私は何が起こったのか分からない。
BACK INTO ENGLISH
I don't know what happened.
Yes! You've got it man! You've got it