Sentence examples for it is certainly working from inspiring English sources

"He likes us to go and express themselves and it is certainly working so far".

It was certainly working for her.

It's a viable strategy, and it's certainly working for the time being".

The feedback I'm getting is that it's certainly working for others!

Perhaps not, but it was certainly working beautifully as she countered Sharapova's increasingly desperate returns and ground strokes with big, on-target hitting.

Perhaps not, but it was certainly working beautifully as she countered Sharapova's increasingly desperate returns and ground strokes with big punches of her own.

I've no idea if that's true, but David Fincher has been putting a similar theory into practice for the best part of a decade now and it's certainly working for him.

"That formula has worked well in other parts of the country, it's certainly working well on Kent County Council, and I would expect Maidstone to be much the same".

If it's the latter, it's certainly working, at least for the time being.

Write what you know is supposed to be the mantra for emerging writers: it's certainly worked well enough for Paddy Campbell, whose remarkable 2013 debut Wet House drew on his first-hand experience of working in a hostel for homeless alcoholics.

It's certainly worked with Facebook.