YOU SAID:
I should not be twenty-one by now.
INTO JAPANESE
私は今は21歳になるべきではない。
BACK INTO ENGLISH
I should not be 21 at the moment.
INTO JAPANESE
私は現時点では21歳にならないはずです。
BACK INTO ENGLISH
I should not be 21 at the present moment.
INTO JAPANESE
私は現時点では21歳にならないはずです。
BACK INTO ENGLISH
I should not be 21 at the present moment.
You've done this before, haven't you.