studies have been carried out vs studies have carried out

Both phrases are correct, but they are used in different contexts. "Studies have been carried out" is the more common and formal way to express that research has been conducted. On the other hand, "studies have carried out" is less common and would typically be followed by the object of the studies to indicate what they have carried out.

Last updated: March 29, 2024 • 1407 views

This phrase is correct and commonly used in English to indicate that research or investigations have been conducted.

"studies have been carried out "

This phrase is used to describe completed research or investigations. It is often used in formal contexts.

Examples:

Studies have been carried out to assess the impact of climate change on marine life.
Several studies have been carried out to determine the effectiveness of the new drug.

Show examples from the web [+]

No acute toxicity studies have been carried out.
No specific clinical studies have been carried out with the combined tablet.
Standard reproductive and developmental toxicity studies have been carried out using parenteral administration of fentanyl.
No formal drug-drug interactions studies have been carried out with alglucosidase alfa.
In addition, no comparative studies have been carried out in children.
No studies have been carried out in paediatric patients with hepatic disorder.
In five countries in which studies have been carried out - Holland, Portugal, Spain, France and Germany - compensation for hearing problems costs EUR 96 billion a year.
Whereby dental amalgam are well known compounds on which extensive studies have been carried out, information is still missing on the full composition and exposure to certain alternative materials.
Impact studies have been carried out and the results indicate that the new rules would result in fair and proportionate capital requirements for exposures for SMEs, so SMEs stand to benefit, and therefore I cannot agree with Mr Ilgenfritz.
In the case of medicinal products for which paediatric studies have been carried out, and provided that results of those studies are reflected in the product information, the Parties shall provide for a further six months extension of the period of protection referred to in paragraph 2.
Studies have been carried out to prove that Acticam is' bioequivalent' to the reference veterinary medicine: this means that Acticam is equivalent to Metacam 1.5 mg/ ml suspension in the way it is absorbed and used by the body.
Studies have been carried out to prove that Flexicam is' bioequivalent' to the reference veterinary medicine: this means that Flexicam is equivalent to Metacam 1.5 mg/ ml suspension in the way it is absorbed and used by the body.
Studies have been carried out to prove that Meloxivet is' bioequivalent' to the reference veterinary medicine: this means that Meloxivet is equivalent to Metacam 1.5 mg/ ml suspension in the way it is absorbed and used by the body.
Studies have been carried out to prove that Rheumocam is' bioequivalent' to the reference veterinary medicine which means that Rheumocam is equivalent to Metacam 1.5 mg/ ml suspension in the way it is absorbed and used by the body.
In chemotherapy, three main studies have been carried out.
Many studies have been carried out over the years on equal rights for women and men, without leading to appropriate measures.
As we have already observed, measures must be put in place after studies have been carried out, resulting in a ban on hazardous substances.
No formal interaction studies have been carried out to find out whether Betaferon affects other medicines or is affected by them.
Because of the nature of the product, no animal studies have been carried out to establish the carcinogenic effects of NeuroBloc.
With the exception of an acute toxicity study, no further studies have been carried out in juvenile animals with Pedea.

Alternatives:

Research has been conducted
Studies have been conducted
Studies have been performed
Studies have been undertaken
Studies have been executed

This phrase is correct but less common. It would typically be followed by the object of the studies to indicate what they have carried out.

"studies have carried out "

This phrase can be used when specifying what the studies have carried out. It is less common than the passive voice construction.

Show examples from the web [+]

In chemotherapy, three main studies have been carried out.
No acute toxicity studies have been carried out.
Standard reproductive and developmental toxicity studies have been carried out using parenteral administration of fentanyl.
No formal drug-drug interactions studies have been carried out with alglucosidase alfa.
In addition, no comparative studies have been carried out in children.
No specific clinical studies have been carried out with the combined tablet.
No studies have been carried out in paediatric patients with hepatic disorder.
Certain studies have been carried out by the Commission on the impact of enlargement on European Union industries although no specific studies have been carried out on the match industry.
With the exception of an acute toxicity study, no further studies have been carried out in juvenile animals with Pedea.
No formal interaction studies have been carried out to find out whether Betaferon affects other medicines or is affected by them.
Many studies have been carried out over the years on equal rights for women and men, without leading to appropriate measures.
As we have already observed, measures must be put in place after studies have been carried out, resulting in a ban on hazardous substances.
Because of the nature of the product, no animal studies have been carried out to establish the carcinogenic effects of NeuroBloc.
No specific interaction studies have been carried out, but alendronate was used in clinical trials concomitantly with a number of other commonly prescribed medicines without any evidence of clinically unfavourable interactions.
As intranasal calcitonin is indicated for postmenopausal women, no studies have been carried out in pregnant women or nursing mothers.
In five countries in which studies have been carried out - Holland, Portugal, Spain, France and Germany - compensation for hearing problems costs EUR 96 billion a year.
Extremely few scientific studies have been carried out into the problems of eating disorders.
Within the last few years, a number of studies have been carried out in Germany into water coolers.
Many studies have been carried out not only by the Commission but also by industry and by various sectors.
As the Commission emphasised recently, quality should be given preference over convergence and sufficient time should be spent on finalising the new standards after thorough economic impact studies have been carried out.

Alternatives:

Studies have conducted experiments on...
Studies have performed research on...
Studies have undertaken investigations on...
Studies have executed studies on...
Studies have completed research on...

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studies have been carried out vs studies have carried out