The phrase "focused since" is grammatically correct and can be used in written English, though it may sound slightly awkward or incomplete.
It would typically be used in situations where the speaker is expressing a state of being focused that has been ongoing since a certain point in time. An example could be: "I've been focused since I woke up this morning, determined to finish this project before the deadline."
And it is here that the country's attention has been focused since.
Instead, the Women's Network has focused since 1998 on coaching women in public speaking, in making effective presentations and in exuding leadership qualities.
But it also reflects how major liberal donors and independent groups have focused since 2004 on creating a permanent infrastructure of liberal research and voter-outreach groups.
"It is chic today to be anti-Saudi," the official said, blaming Mr. bin Laden, who was born into a wealthy Saudi family, for the attention that has been focused since Sept. 11 on religious practice in his country.
It was a Yorkshire lad, born and bred, who organised the 2005 attacks, though al-Qaeda tugged the strings.Politicians have focused since then on discouraging more home-grown bombers.
These failures probably explain why Carlyle has focused since then on acquiring existing businesses, rather than starting new ones from scratch.Its acquisition of AlpInvest makes it the first major buy-out firm to have a private-equity fund of funds.
And they're focussed: since their job is studying and explaining the object at hand, they are especially alert to its nuances.
This will help you focus since you can't tell when you get a notification.
This will help you focus since it'll be harder to get distracted or to do something other than pay attention when the teacher is right there.
Because it has been recognized that in nature information processes are not strictly sequential, increasing attention has been focused since 1980 on the study of the human brain as an information processor of the parallel type.
"It is what we have focused on since we qualified".
