The phrase "again been able to" is correct and usable in written English.
It can be used when indicating a return to a previous ability or capability after a period of not being able to do something.
Example: "After months of training, I have again been able to run a marathon."
Alternatives: "once more able to" or "able to again".
Victims of the first TalkTalk security breach last November are still fighting for compensation after losing thousands of pounds – and they say they are appalled that hackers have again been able to steal customer details from the telecoms giant.
Under America's four-decade-old economic embargo, only the Treasury can allow the use of dollars in transactions with Cuba.But this also means that Mr Castro has once again been able to use the embargo as a pretext for imposing new restrictions on his people.
Lacking the realistic base and the beautifully engineered structure that Mankiewicz provided, Welles has never again been able to release that charming, wicked rapport with the audience that he brought to "Kane" both as actor and as director (or has been able to release it only in distorted form, in self-satire and self-humiliation).
But you'd have to say, it's lucky for Canada, too, if it has once again been able to postpone its day of reckoning, to a time when its neighbour and main trading partner is on the mend.
It has only been in the past few years, as major Western oil companies have successfully partnered themselves with the Azeri government, that the country has once again been able to profit from the huge petroleum reserves which until the Russian Revolution made its capital Baku one of the richest cities in the world.
Africa may once again be able to feed itself.
We'll never again be able to plead ignorance about that tricky "eponymous" definition: eponymous.
He hoped to return and once again be able to provide for his family.
They might respect Basso, but no, they will never again be able to love him.
The Arabs will never again be able to say: "Why should we do anything?
Now 35, she knows she will never again be able to stand up.
