Dictionary-enhanced word family
Word Forms of “Know”
To understand or have information about something; to be familiar with someone or a place.
Word Family of Know
How to Use Each Word Form in a Sentence
- I know your sister from school. A1
- Do you know where the library is? A1
- She knew the answer to the difficult question immediately. A2
Origin and Word Formation of Know
From Old English 'cnawan', related to Germanic and Indo-European languages meaning to perceive or know.
Most common irregular verb. Phrases: 'you know' (filler in speech), 'know what I mean', 'I don't know' (uncertainty), 'you never know'.
Common Word Form Mistakes with Know
Wrong: I known her for five years.
Correct: I have known her for five years.
Use present perfect 'have known' for duration from past until now, not past participle 'known' alone.
Wrong: Do you knew the way to the station?
Correct: Do you know the way to the station?
In question form with 'do', use base form 'know', not past tense 'knew'.
Frequently Asked Questions About Word Forms of Know
What are the word forms of “know”?
The confirmed forms are shown in the word family cards above. Missing parts of speech are hidden instead of filled with placeholder text.
What part of speech is “know”?
“know” is primarily a verb. Some forms above show how the same root works as other parts of speech.
Where does “know” come from?
From Old English 'cnawan', related to Germanic and Indo-European languages meaning to perceive or know.