Sentence examples for know how long this from inspiring English sources

"I don't know how long this has been going on but clearly this week he wasn't right," Vaughan told BBC Radio 5 Live.

I do not know how long this killing took.

"You know how long this usually takes," she said.

"I don't know how long this majority will last".

"I don't know how long this situation is sustainable".

We don't know how long this will take.

"We don't know how long this will last," he said recently.

"I don't know how long this is going to last," he said.

I'm not being callous but I didn't know how long this would go on.

"I don't know how long this is going to last," Brown said.

"I don't know how long this is going to take," Mr. Gorman said.