Irregular Verb Know: know - knew - known
The irregular verb know does not form its past tense by adding -ed.
| Base form | Simple past | Past participle |
|---|---|---|
| know | knew | known |
How to Use It
- Present: I know.
- Past: Yesterday I knew.
- Present perfect: I have known.
Remember
Use the past participle (known) after have, has or had, and in passive sentences. Learn the three forms together: know - knew - known.
See also: The Simple Past Tense and The Present Perfect Tense.