He must have been very tired today; he went straight to bed.
Unless something quite unusual happens, he is never late.
almost; just about to; very nearly
Indicates that something was close to happening or almost the case. Often used with verbs in the negative or conditional to mean 'nearly did something' or 'was on the verge of'.
See also: よっぽど
I was so happy I almost shouted out loud.
I very nearly refused, but in the end I accepted.
Unless something highly unusual happens, he won't be late.
I was on the verge of getting angry and leaving, but I held back.
He must be quite tired; he's dozing off.
Unless you're truly exceptional, you can't pass that exam.