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The expression 'has been functioning for' is correct and can be used in written English.
You can use this expression to refer to something that has been working, operating, or existing for a given amount of time. For example, "This library has been functioning for over 100 years."
Exact(10)
The Tokyo has been functioning for almost 40 years and has been in residence at Yale since 1976.
Please be advised that the Thalia (now the Leonard Nimoy Thalia), beautifully redesigned, has been functioning for more than two years now.
It has been functioning for the last two weeks as a professional association, rather than a union, but with all of the same employees and contractual relationships.
The Presidential Guard College here has been functioning for several weeks, while the National Security Force Operations Camp elsewhere in Jericho will open at the end of next month.
After all, the IMF model has been functioning for 60 years and has proven itself by bailing out numerous countries over the years.It is a pity to see "Old Europe" pull apart at the seams, but there is no cohesion, no vision and no will to create a viable supranational United States of Europe.
It has been functioning for more than 30 months.
Similar(49)
The prostheses have been functioning for up to 6 years.
Thus, on 1 August, the aerator had been functioning for 3 days.
On 22 August, when the aerator had been functioning for 15 days, temperature in the hypolimnion was 14.8 15.3 °C.
On 1 August, when the aeration had been functioning for 3 days, temperature in the hypolimnion was 11.1 12.5 °C.
It is a traditional process in the clinics in Europe and the USA, where the centre of DS were established and they have been functioning for many decades.
More suggestions(18)
has been operating for
has been existing for
has been unfolding for
has been governing for
has been conducting for
has been sitting for
has been performing for
has been launched for
has been operational for
has been run for
has been operated for
has been implemented for
has been commissioned for
has been announced for
has been organized for
has been festering for
has been intensifying for
has been shrinking for
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com