YOU SAID:
He must have been really thirsty!
INTO JAPANESE
彼は本当に喉が渇いているに違いない!
BACK INTO ENGLISH
He must be really thirsty!
INTO JAPANESE
彼は本当に渇いているはずです!
BACK INTO ENGLISH
He should be really thirsty!
INTO JAPANESE
彼は本当に渇いているはずです!
BACK INTO ENGLISH
He should be really thirsty!
You've done this before, haven't you.