The phrase 'has been endangering' is correct and usable in written English.
You can use it to indicate that something has been causing a threat or danger over a period of time. For example: The use of plastic has been endangering marine life for years.
"The tree has been endangered in many countries because of this widespread devastation," Mr. Blanchette said.
But the flow of new customers has been endangered by the housing downturn, which has made it difficult for the elderly to sell homes or, at least, to sell them for the price they had anticipated.
"We have no concern that the integrity of the election has been endangered at all," former President Jimmy Carter, leading a 48-member observer delegation, said at a news conference here Friday.
He's the Montana Republican whose reelection has been endangered by his connection to the scandal involving convicted lobbyist Jack Abramoff.
Dr. Friedrich Reinhard, owner of a wildlife reserve in Namibia, is using this technology to help rebuild the black rhino population in Africa, which has been endangered by poaching.
3. The Jordan Clarkson/Lou Williams tandem has been endangered by the Lakers' spate of injuries.
Their hold on their homes has been endangered by unemployment or predatory loan terms or falling house values.
This minnow has been endangered by dam construction on the Cape Fear River, which has led to the flooding and destruction of its shallow water habitat.
The breed has been endangered numerous times by warfare sweeping Europe, including during the War of the First Coalition, World War I and World War II.
Indeed Grayson has been endangered by the very judges involved in his case who are supposed to be "guardians of his care".
