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Irregular verbs 1
Elementary
| Term | Definition |
|---|---|
| understand | understood / understood |
| know | knew / known |
| buy | bought / bought |
| choose | chose, chosen |
| fall | fell / fallen |
| think | thought / thought |
| catch | caught / caught |
| fly | flew / flown |
| keep | kept / kept |
| throw | threw / thrown |