they did not know is vs they did not know was

Both phrases are not complete sentences, but if we consider them as part of a larger context, 'they did not know' is correct. 'They did not know' is the correct form to use when referring to a past situation where someone lacked knowledge.

Last updated: March 21, 2024 • 617 views

This phrase is not correct as it lacks completion. 'Is' should be followed by a noun or adjective to form a complete sentence.

"they did not know is "

To make this phrase correct, it needs to be part of a larger sentence. For example, 'What they did not know is the truth.'

Show examples from the web [+]

2. What is the period in the 1500's when Europeans started searching for lands they did not know is called? A. The New World. B. The Age of Exploration ...
The period in the 1500s when Europeans started searching for lands they did not know is called the Age of Exploration. 10 people found this useful. Edit.
Dec 24, 2015 ... What they did not know is that we had secretly gone on a crazy shopping spree with thousands of dollars to help everyone's Christmas dreams ...
Mar 25, 2016 ... What they did not know is that there were no other players and that the system was programmed to vary the number of times the ball was ...

This phrase is also incomplete. 'Was' should be followed by a noun or adjective to form a complete sentence.

"they did not know was"

To make this phrase correct, it needs to be part of a larger sentence. For example, 'What they did not know was the answer.'

Show examples from the web [+]

After weeks and months everyone thought I should be back to. “norma ”, but what they did not know was life would never be normal again. I got very interested in ...
The thing they did not know was that he was divine--but they must have known more than enough beyond that point to be guilty, hideously guilty. So, unless we ...
What they did not know was how Moshe Rabbeinu, at the right time, would inscribe a metal plate with a Name of God on it, as well as the words, “Arise Ox!” ...
What they did not know was a sinful, fallen condition, because they were not in that condition before their rebellion. ii. We often feel uncomfortable when ...

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they did not know is vs they did not know was