YOU SAID:
He must've forgot to close his door
INTO JAPANESE
彼はドアを閉めるのを忘れたに違いない
BACK INTO ENGLISH
He must have forgotten to close the door.
INTO JAPANESE
彼はドアを閉めるのを忘れたに違いない。
BACK INTO ENGLISH
He must have forgotten to close the door.
Yes! You've got it man! You've got it