The phrase "they have escalated" is a correct and usable phrase in written English.
You can use it when referring to an increase in intensity or frequency of a certain action. Example: Due to the increasing demand, they have escalated their production output.
They have escalated their terrorist acts, killings of civilians and policemen, and destruction of public and private properties.
Prices in these areas have risen from 5to25percentent in the last year, brokers say; in the Hamptons they have escalated by at least 20percentt.
The parent added in the e-mail message, "There have been too many cases of physical and emotional aggression over the year, and they have escalated significantly over the past few weeks.
The wildness and binge drinking have taken on new dimensions since the Flames made the playoffs for the first time after seven disappointing seasons, and they have escalated with each victory over the highly favored Vancouver Canucks, then the Detroit Red Wings, then the San Jose Sharks, and finally with their opening game victory at Tampa Bay.
Lately, they have escalated the dependence upon machines to either render the supposed irrational behaviors moot, or, in the most extreme cases, to eliminate the pesky human element altogether.
In the first three installments of this series, I have looked at how the educational process, judicial systems and workforce work against the needs the Black boys, often ignoring their plights in their early stages until they have escalated to a point where they cannot be fixed.
Eight participants reported an episode of problematic accommodation, such as a hostel, during which they had escalated their substance use, in terms of quantity and types of substances used.
But, given that the tomb was the site of a sustained firefight, they believed that they would have escalated the conflict and caused more casualties on both sides by bringing in tanks to rescue him.
There was something moving about the fraternal intimacy the ex-President kept referring to Jeb as "Brother"—and all this talk of character, but they seemed to have escalated at the moment of defeat.
By Benjamin Wallace-Wells February 19 , 2016There was something moving about the fraternal intimacy that George W. Bush displayed for Jeb this week in South Carolina, but they seemed to have escalated at the moment of defeat.
The factors that predisposed me to HIV then are still with us; in fact, they seem to have escalated.
