How To Use Knuckle down In A Sentence

He is clearly ready to knuckle down to the task.
They are better at pacing themselves and tend to knuckle down to the homework throughout the course.
You'll shoot in a truer straight line if you knuckle down.
He managed to knuckle down to his lessons long enough to pass his examination.
The only thing to do was knuckle down and get on with some serious hard work.

You have to knuckle down and get on with it, as there were times when I would be the most senior professional playing in the reserves after travelling with the first team and not being involved.
If you want to pass that exam, you'll have to knuckle down.
You'll shoot in a truer straight line if you knuckle down.
The only thing to do was knuckle down and get on with some serious hard work.
I decide to knuckle down for an hour and get the job done.
You'll shoot in a truer straight line if you knuckle down.
But it helped him knuckle down and now he is an integral part of the Burnley machine. The Sun
But it helped him knuckle down and now he is an integral part of the Burnley machine. The Sun
But it helped him knuckle down and now he is an integral part of the Burnley machine. The Sun