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Discover LudwigSuggestions(5)
The phrase "are two groups of" is correct and usable in written English.
It can be used when describing or identifying two distinct categories or collections of items, people, or concepts.
Example: "In the study, there are two groups of participants: one receiving treatment and the other receiving a placebo."
Alternatives: "consist of two groups of" or "comprise two groups of".
Exact(60)
There are two groups of islands.
There are two groups of RT inhibitors.
"There are two groups of people," Dr. Neuman said.
There are two groups of casualties in this "war".
For those out of work, there are two groups of benefits.
There are two groups of honey-combs that sit on top of each other.
"There are two groups of people who are thinking about amending the Constitution," Barnett said.
There are two groups of slime molds: the cellular slime molds and the acellular slime molds.
There are two groups of eight or nine, each with an eighth grader to lead.
There are two groups of phagocytic cells, white blood cells polymorphonuclear leukocytes and tissue cells.
On the dorsal side of the neck are two groups of bony scales called scutes.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com