'Doing' in the Bible

For in our letters we say no other things to you, but those which you are reading, and to which you give agreement, and, it is my hope, will go on doing so to the end:

Then make the doing of it complete; so that as you had a ready mind, you may give effect to it as you are able.

And when I was present with you, and was in need, I let no man be responsible for me; for the brothers, when they came from Macedonia, gave me whatever was needed; and in everything I kept myself from being a trouble to you, and I will go on doing so.

But what I do, that I will go on doing, so that I may give no chance to those who are looking for one; so that, in the cause of their pride, they may be seen to be the same as we are.