Used and loved by millions
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
had already known
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "had already known" is correct and usable in written English.
It can be used to indicate that someone had prior knowledge of something before a certain point in time. Example: "By the time the meeting started, I had already known about the changes to the project."
✓ Grammatically correct
News & Media
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
45 human-written examples
Amy and I had already known each other for five years by then.
News & Media
I did find favorites — some new, and some I had already known.
News & Media
Why was it announced when all the refugees had already known about his death?
News & Media
People were happy but calm, as they had already known that the results were a landslide.
News & Media
And Mr. Massey testified he had already known whom to contact.
News & Media
It was as if she had already known them, so small was her need to learn them.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
14 human-written examples
And when she came, she went in the room with my friend, the one she had already knew.
News & Media
"He looked like someone I should have already known.
News & Media
Why call to tell someone something they must have already known?
News & Media
The Philippines and its allies must have already known that China would never accept this judgment under the current situation.
News & Media
Previous missions to planets like Mars have been far less complex, said Dr Jansen, as ESA has already known about the objects, their densities and their atmospheres.
News & Media
Expert writing Tips
Best practice
When using "had already known", ensure the context clearly indicates when the knowledge was acquired in relation to another past event. This clarifies the timeline for the reader.
Common error
Avoid using "had already known" when the simple past tense ("knew") is sufficient. The past perfect is necessary only when referencing a prior action or state relative to another point in the past. For example, use "I knew" instead of "I had already known" if there's no prior point of reference.
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had already known" functions as a past perfect verb phrase, indicating a state of knowing that existed before a specific point in the past. It establishes a temporal relationship, as Ludwig's examples clearly demonstrate.
Frequent in
News & Media
68%
Science
18%
Wiki
5%
Less common in
Formal & Business
3%
Reference
3%
Social Media
0%
Ludwig's WRAP-UP
The phrase "had already known" is a versatile and grammatically sound construction used to indicate prior knowledge before a specific time in the past. Ludwig AI confirms its correctness and common usage across various contexts. It’s important to use the past perfect tense correctly to sequence events accurately. While alternatives like "was already aware of" exist, "had already known" effectively communicates prior awareness. When writing, make sure to define the moment/time when the knowledge existed to avoid ambiguities.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
already knew
Simplifies the tense while retaining the core meaning of prior knowledge.
was already aware of
Focuses on the state of awareness rather than the acquisition of knowledge.
had previous knowledge of
Emphasizes the prior existence of the knowledge.
had prior understanding of
Stresses the comprehension aspect of the knowledge.
was previously informed about
Highlights that the knowledge was received through information.
had learned beforehand
Highlights the timing of learning before a specific event.
was acquainted with
Focuses on a general familiarity, not necessarily in-depth knowledge.
was no stranger to
Indicates familiarity through experience, rather than direct knowledge.
had anticipated
Similar to foreseen but with a sense of expectation.
had foreseen
Emphasizes anticipation of something before it happened.
FAQs
How can I use "had already known" in a sentence?
Use "had already known" to indicate that someone possessed knowledge of something before a specific event or time in the past. For example, "By the time the announcement was made, I "had already known" about the changes."
What's the difference between "already knew" and "had already known"?
"Already knew" uses the simple past tense, while "had already known" uses the past perfect. The past perfect is used to indicate that something happened before another event in the past. For example, "I "already knew" about the surprise party" vs "I "had already known" about the party when she told me."
What can I say instead of "had already known"?
You can use alternatives like "was already aware of", ""already knew"", or "had previous knowledge of" depending on the specific context.
When should I use "had already known" instead of "knew"?
Use "had already known" when you want to emphasize that the knowledge existed before another event in the past. If you are simply stating a fact in the past without reference to another event, use "knew". For example, "I knew his name" vs. "I "had already known" his name before he introduced himself."
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
87%
Authority and reliability
4.5/5
Expert rating
Real-world application tested