Again, every bad man is ignorant what he ought to do and what to leave undone, and by reason of such error men become unjust and wholly evil.
But the Evangel does not preach what we are to do or to leave undone, it requires nothing of us.
What He wished us to do or leave undone, that He not only did or left undone but also enjoined or forbade in so many words.
For there are many who do the good and leave the evil undone out of fear of shame and love of honor, and so do what they would otherwise by no means do or leave undone.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "leave undone" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.