We don't really care to know when Mrs. Kelly borrows eggs of the editor's wife and how many dolls Betty got for Christmas and Jack's grades in high school.
I want to be sure to know when we're getting near Canton, Dolly.
You're the best little cheerer-up I know when I feel blue.
He has lost his place through the malice and jealousy of Mr. and Mrs. Pitkin, for I am sure that Lavinia is the cause of his dismissal, and I don't know when he will be able to get another.
I must make my money last as long as I can, for I don't know when I shall get a place.
Mr. Carter has left the city, and I really don't know when he will return," Phil heard her say.
If you can't, I'll go to your office if you will let me know when you'll be in.
He missed me, he wished to know when I was coming over.
We know when we've got a good thing, and we don't want to wear you out.
I will use a spare hour to begin an account of our doings since I last wrote, but I don't know when I shall be able to finish it, still less when post it.
I don't know when I shall next get one of your letters.
This he did in a very strong letter to Daschoff, and I presented it this morning, but the Minister, like Edison, said he would let me know when he could see me.
I don't know when we shall get away but it is no use kicking about it, Michaelson is doing all he can and the new tug will be along in a week anyway.
I don't know when I have seen anything as curious, and as complicated a political existence.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "know when" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.