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
how did he contract
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "how did he contract" is correct and usable in written English.
It can be used when inquiring about the method or means by which someone acquired a disease or condition. Example: "I was curious to know how did he contract the virus during the outbreak."
✓ Grammatically correct
News & Media
Science
Alternative expressions(4)
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
1 human-written examples
How did he contract it?
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
59 human-written examples
How did he train?
News & Media
How did he yank?
News & Media
How did he continue?
News & Media
"How did he change?
News & Media
How did he do?
News & Media
"I: How did he know?
Science
How does he begin?
News & Media
How does he escape?
News & Media
We have the infamous affliction informally known as wanderlust which describes a "craving to travel"...but how does one contract an obsession and how does one go about feeding that habit?
News & Media
How did the contract make?
News & Media
Expert writing Tips
Best practice
When using the phrase "how did he contract", ensure the context clearly indicates a disease, illness, or undesirable condition. This avoids ambiguity and ensures the phrase is used appropriately.
Common error
Avoid using "how did he contract" when referring to acquiring non-medical things like habits or skills. Use more appropriate verbs like "acquire", "learn", or "develop" in those contexts.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "how did he contract" functions as an interrogative clause. It introduces a question regarding the manner in which an individual acquired a disease or condition. Ludwig confirms its usability in written English.
Frequent in
News & Media
40%
Science
30%
Wiki
10%
Less common in
Formal & Business
5%
Reference
5%
Academia
10%
Ludwig's WRAP-UP
The phrase "how did he contract" is a commonly used interrogative clause that seeks information about the means by which someone acquired a disease or condition. Ludwig AI confirms its correctness and usability. It's generally appropriate for neutral registers, suitable for news, science, and general discussions. When using this phrase, ensure the context clearly involves a disease or undesirable condition to avoid any ambiguity. Alternatives such as "how did he acquire" or "how did he get" can be used for varying levels of formality. Though this phrase is suitable in a number of contexts, it's important to note the appropriateness of using this only in the context of a disease or illness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
how did he acquire
Replaces "contract" with "acquire", focusing on the process of gaining something, including a disease.
how did he get
Uses the more informal verb "get" instead of "contract", simplifying the language.
what caused him to contract
Shifts the focus to the cause of the contraction rather than the act itself.
what was the source of his infection
Focuses on the origin or cause of the infection, changing the sentence structure.
how was he infected with
Uses the passive voice to emphasize the process of being infected.
what were the circumstances of his contracting
Emphasizes the situation or conditions under which the contraction occurred.
under what conditions did he contract
Similar to the previous phrase, highlighting the circumstances of the event.
how did he come down with
Uses the colloquial expression "come down with" to indicate the onset of an illness.
what was the mode of transmission for his illness
Focuses on the method by which the illness was transmitted to him.
through what means did he contract
Emphasizes the method or instrument used in contracting the disease.
FAQs
How to use "how did he contract" in a sentence?
Use "how did he contract" to ask about the manner in which someone acquired a disease or illness. For example, "I am curious, /s/how+did+he+contract the virus during the outbreak?"
What can I say instead of "how did he contract"?
You can use alternatives like "how did he acquire", "how did he get", or "what caused him to contract" depending on the context.
Which is correct, "how did he contract" or "how he contracted"?
"How did he contract" is a question, while "how he contracted" is a clause (e.g. "I don't know how he contracted the disease.").
Is it appropriate to use "how did he contract" in formal writing?
Yes, "how did he contract" is appropriate for formal writing when discussing medical or health-related topics. However, consider alternatives like "how did he acquire" for potentially greater formality.
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
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested