"for a long time" — for takes a timespan as its object ; or "since a long time ago" — ago 'recategorizes' time as a point in time. It's a very vague, unspecific point, a "fuzzy" point, but it's a point. It doesn't really matter whether you say "It has been known for a long time" or "For a long time it has been known".
Define has been known. has been known synonyms, has been known pronunciation, has been known translation, English dictionary definition of has been known. v. knew , known , know·ing , knows v. tr. 1. To perceive directly; grasp in the mind with clarity or certainty. 2. To regard as true beyond doubt: I know...
As far as I know, '(for) a long time' is preffered to 'long' in affirmative sentences unless 'long' is matched up with too, enough, as, so, before, after, and etc. I read the following sentence on the website, however, and got a little confused: Smoking has long been linked to lung cancer.
It has long been known that people who are exposed to acrylamide for long periods could sustain damage to their nervous system, develop cancer and suffer permanent genetic damage. It has long been known which virus causes the disease. It has long been known to relieve pain, such as that in your leg, and it also calms disturbances of the bowel.
Context sentences for "it has long been known" in Polish. These sentences come from external sources and may not be accurate. bab.la is not responsible for their content.
The Galápagos Islands have long been lauded for biodiversity and endemism. But there are lesser known outposts, often thousands of miles away from inhabited areas, profuse with wildlife.
"Apple has long been known as a litigious company, suing many various enterprises over the years for alleged copyright and patent infringement," (that's a quote) so the latest legal attack is no ...
1 I have long been learning English. This means you have been learning English for a long time. I would also say that is a rarely used construction (to have long been doing sth) - it's not wrong at all, but we would probably be more likely to say "I've been learning English for a long time". 2 I continue learning English.
OALD's entry's example: The company has long been shunned by ethical investors. I always get confused with word order (unless they are 'adjectives' for what I know the order). The example is ...
Hollywood has treated the story of Bonnie and Clyde several times, most notably: William Witney directed the film The Bonnie Parker Story (1958), starring Dorothy Provine. Arthur Penn directed the best-known version of the tale, Bonnie and Clyde (1967), which starred Warren Beatty and Faye Dunaway.