“不及格”造句

这是及格和不及格的差别.
It'sthe difference between a pass and a fail.

我二年级时数学不及格。
I flunked math in second grade.

要是下次作业你再马马虎虎, 我话说在头里,可要给你打不及格了.
If you do such sloppy work again, I promise I'll fail you.