Sentence examples for know how serious from inspiring English sources

"It is impossible to know how serious.

You know how serious this is.

I don't know how serious it is.

I know how serious this sport is".

"We know how serious this problem is.

"I know how serious it could get," he said.

I know how serious the task is before me.

But I don't know how serious that was".

I don't know how serious, but the Christmas period is certainly over for him.

"We don't know how serious the terrorist threat is here," she said.

I was scared, but I didn't know how serious it was.