YOU SAID:
kai and alex think that i don t know
INTO JAPANESE
カイとアレックスは私が知らないと思っている
BACK INTO ENGLISH
Kai and Alex think I don't know.
INTO JAPANESE
カイとアレックスは私が知らないと思っています。
BACK INTO ENGLISH
Kai and Alex think I don't know.
That didn't even make that much sense in English.