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