"has remained as" is a grammatically correct and commonly used phrase in written English.
It is typically used to describe something that has not changed over time or has stayed in a specific state. Example: Despite the passing of many years, the ancient ruins have remained as a testament to the civilization that once existed there.
For its residents, life has remained as wretched as ever.
"Branchville has remained as is for many years," she said.
What about putting, that part of golf that has remained as elusive as the Holy Grail?
But Venezuelan rhetoric towards the US has remained as hostile as they were under Mr Chavez.
In the middle of it all is Manning, who has remained as cool as ever.
Leonard subsequently moved away from writing in dialect, but his concern with bringing excluded voices into poetry has remained as strong as ever.
She has remained as engaged as ever: she continues to be a passionate crusader against censorship, and has turned her pen to Aids, the Middle East, global poverty.
But as the summer has gotten hotter -- a signal the annual ritual of sweaty N.F.L. training camps is about to start -- the owner, Art Modell, has remained as cool as a glass of chilled water.
Since touching down in the US he has remained as active as ever, posting on Twitter and other social media and keeping in touch digitally with a global network of human rights lawyers, officials, politicians and international campaigners.
(The tax had been 5 percent in 2009 and 7.5 percent this year; through the downturn, the tax has remained as high as 40 percent for sport utility vehicles and sports cars with the most powerful engines).
Meanwhile the great divide between public and private education has remained as important as ever.With the targets and the cash eventually came attempts to give schools more autonomy, identity and outside sponsorship.
