"concentrating on work" is a grammatically correct and commonly used phrase in written English.
You can use it to describe someone who is focused and putting their effort into their job or tasks. Example: Despite the distractions around him, John was able to keep concentrating on work and meet his deadline for the project.
The actor told E Newss last month that he's been busy "just really concentrating on work," so one might assume Hunnam has placed his thoughts elsewhere -- even if the coy smile that spreads across his face upon hearing the question provides an alternate commentary.
We all had a lot of fun, but now we've grown up and we're really serious and concentrating on work.
She chalks that up to "being partial" to her own scripts (she said she has written 25 so far) and concentrating on work she is passionate about.
One girlfriend from that time remembers Constantine's attempts to impress his father by avoiding drink and drugs and concentrating on work.
Women seem to be feeling it more than men, because many men can displace their worries by watching sports, concentrating on work or rooting for a war against Iraq.
and 'Why can't I be more British?' Well, let me say I don't smile when I'm concentrating on work - well, do you go around with a grin on your face when you're reading up some concentrated research?
The fourth gallery, concentrating on works from the 1960s, abounds with discordant reliefs, assemblages, collages and found-object sculptures by Lee Bontecou, John Chamberlain, Yayoi Kusama, Arman, Daniel Spoerri and Jacques de la Villiglé.
Snowden and Huang are concentrating on working with Apple's iPhone, but also said the device could be modified to work on other smartphones.
"We were just concentrating on working on the race set-up and we still have plenty of margin to improve.
I took on too much and tried to fix everyone's lives instead of concentrating on working on my own.
"I'm more comfortable making choices rather than just concentrating on working with enough to get by".
