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Discover LudwigSuggestions(2)
The phrase "how effective was it" is grammatically correct and can be used in written English.
It is typically used to ask about the degree of success or impact that something had. Example: "The new advertising campaign received a lot of positive feedback. How effective was it in increasing sales?".
Exact(2)
Q: How effective was it?
(If received treatment) How effective was it?
Similar(57)
But how effective is it?
How effective is it?
How does it do so, and how effective is it?
But how effective is it, really?
But what exactly is being done now, and how effective is it?
Have we really managed to get computers to actually aid creative design and how effective is it?
"...Objectively, the issue is rather: how is your rule, and how effective is it?
"I know we have a process, but how effective is it?
Just how effective was Sanders?
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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