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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
had supposed that
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "had supposed that" is correct and usable in written English.
It can be used when expressing a past assumption or belief about something that was thought to be true. Example: "I had supposed that the meeting would start at 10 AM, but it was actually scheduled for noon."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
12 human-written examples
She told him how she had supposed that to be petrified was to be motionless.
News & Media
He had supposed that creatures that fed or nested on mistletoe would be affected by its removal.
News & Media
But his attentions are now firmly on the presidency.Some had supposed that Chuck Schumer might run for governor.
News & Media
When tactical nuclear weapons such as the Honest John rocket were introduced into the NATO inventory during the 1950s, the U.S. Army had supposed that those could be considered quite separately from intercontinental strategic missiles.
Encyclopedias
Jean-Baptiste Lamarck, in the early nineteenth century, had supposed that when an antelope strained its neck to reach a tree its efforts were somehow passed down and its progeny evolved into giraffes.
News & Media
In the article, Wilson relates his surprise at the enduring popularity of the genre: One had supposed that the ghost story itself was already an obsolete form; that it had been killed by the electric light.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
46 human-written examples
On the basis of these observations, we have supposed that persistent and high levels of oxidized bases could damage DNA and that rupture of DNA integrity could trigger programmed cell death.
One might have supposed that miracles were beyond proof and therefore beyond argument, but Hume didn't think so.
News & Media
have supposed that treatment should be predicated on a realistic view of what can and cannot be enforced.
News & Media
Hearing the fierce singing, "one would have supposed that we were the captors and they the prisoners," a veteran recalled.
News & Media
(Modern researchers have supposed that Herodotus' ants were really marmots; if I was supposed to be hearing a rodent, I missed that).
News & Media
Expert writing Tips
Best practice
Use "had supposed that" to clearly indicate a past assumption that may or may not have been accurate. This helps to establish a contrast between a previous belief and the current understanding.
Common error
Avoid using "had supposed that" when describing a current belief. This phrase indicates a past assumption, not a present one. Use "I suppose that" for current beliefs.
Source & Trust
92%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "had supposed that" functions as a verb phrase introducing a subordinate clause expressing a past assumption or belief. It's often used to contrast a prior understanding with a current state of affairs, as demonstrated in Ludwig's examples.
Frequent in
News & Media
47%
Science
35%
Encyclopedias
18%
Less common in
Formal & Business
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "had supposed that" is a grammatically correct and commonly used way to express a past assumption or belief. Ludwig AI confirms its validity. It appears frequently in news, scientific, and encyclopedic contexts, suggesting a formal register. While alternatives like "had assumed that" or "had believed that" exist, "had supposed that" effectively conveys a past understanding that may no longer be accurate. Remember to use it when indicating a shift from a previous belief, and avoid using it for current beliefs.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
had assumed that
Replaces "supposed" with "assumed", implying a belief taken for granted without proof.
had believed that
Substitutes "supposed" with "believed", suggesting a stronger conviction in the past.
had thought that
Replaces "supposed" with "thought", indicating a more casual consideration.
had imagined that
Uses "imagined" instead of "supposed", implying a mental picture or idea.
had presumed that
Replaces "supposed" with "presumed", suggesting a belief based on probability or likelihood.
had expected that
Substitutes "supposed" with "expected", indicating an anticipation of a particular outcome.
had anticipated that
Replaces "supposed" with "anticipated", suggesting a proactive expectation.
had figured that
Uses "figured" instead of "supposed", indicating a conclusion reached through reasoning.
had gathered that
Replaces "supposed" with "gathered", implying an understanding formed from indirect information.
had understood that
Substitutes "supposed" with "understood", suggesting a clear comprehension.
FAQs
What does "had supposed that" mean?
The phrase "had supposed that" indicates a past assumption or belief that someone held. It implies that the belief may no longer be accurate or relevant.
How can I use "had supposed that" in a sentence?
You can use "had supposed that" to express a past belief, for instance: "I "had supposed that" the meeting would be longer, but it ended early."
Which is correct, "had supposed that" or "would have supposed that"?
"Had supposed that" is generally more direct for stating a past belief. "Would have supposed that" implies a conditional or hypothetical situation, for example: "One "would have supposed that" the weather would be better in July."
What are some alternatives to "had supposed that"?
Alternatives include "had assumed that", "had believed that", or "had thought that", depending on the context and the strength of the past belief.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
92%
Authority and reliability
4.5/5
Expert rating
Real-world application tested