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
was do
Grammar usage guide and real-world examplesUSAGE SUMMARY
"was do" is not a grammatically correct phrase in written English.
You could use "was doing" in this context if you were referring to something that was happening at a specific time in the past. For example, "I was doing my homework when the power went out."
⚠ May contain grammatical issues
News & Media
Science
Wiki
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
59 human-written examples
It was do or die.
News & Media
One title was "Do the Stepfather Dance".
News & Media
"It was do or die for us.
News & Media
"It was do or die," she says.
News & Media
His motto was, "Do no evil".
News & Media
"It was do or die," he said.
News & Media
So it was do or die".
News & Media
"Warhol's philosophy was 'Do everything,' " Mr. Powers likes to say.
News & Media
"The decision never was: do you want Cliff Lee?
News & Media
"All he said was: 'Do what's best for you.
News & Media
It was do or die – literally for some.
News & Media
Expert writing Tips
Best practice
When intending to describe an action in progress in the past, use the correct form "was doing" instead of "was do".
Common error
Avoid using the base form of a verb after "was"; always conjugate to "was doing" for continuous actions in the past.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "was do" typically appears as part of a verb phrase but is grammatically incorrect. As Ludwig AI explains, it should usually be replaced with "was doing" to indicate continuous action in the past. The incorrect usage often arises when the speaker/writer doesn't fully conjugate the verb.
Frequent in
News & Media
40%
Science
30%
Wiki
15%
Less common in
Formal & Business
5%
Encyclopedias
5%
Academia
5%
Ludwig's WRAP-UP
While the phrase "was do" appears frequently across various sources, as confirmed by Ludwig, it is grammatically incorrect. The Ludwig AI analysis points out that the correct form is typically "was doing", to indicate a continuous action in the past. Therefore, while you might encounter "was do" in informal contexts or quoted speech, it's essential to use "was doing" or other appropriate past tense forms in formal writing and communication to ensure clarity and correctness.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
was doing
Corrects the grammar to the past continuous tense, indicating an ongoing action in the past.
used to do
Indicates a past habit or repeated action.
did
Simple past tense of 'do', referring to a completed action.
were doing
Past continuous tense for plural subjects or 'you'.
was going to do
Expresses an intention to perform an action in the past.
was about to do
Indicates an action that was on the verge of happening.
had to do
Expresses obligation or necessity in the past.
needed to do
Indicates a requirement or need to perform an action.
was required to do
Formal way of expressing obligation in the past.
chose to do
Highlights the decision to perform an action.
FAQs
How to correct the phrase "was do" in a sentence?
The grammatically correct form is "was doing". For example, instead of "He was do his homework", say "He "was doing" his homework".
What is the difference between "was do" and "was done"?
"Was do" is grammatically incorrect, while "was done" indicates that something was completed or acted upon. For example, "The project "was done"" means it was finished.
Can "was do" ever be correct?
No, "was do" is not a grammatically correct phrase in standard English. The correct form depends on the intended meaning, such as "was doing" or "used to do".
What can I say instead of "was do"?
Depending on the context, you can use alternatives like ""was doing"", "used to do", or simply "did".
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
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested