| I | surf |
|---|---|
| you | surf |
| he/she/it | surfs |
| we | surf |
| you | surf |
| they | surf |
| I | surfed |
|---|---|
| you | surfed |
| he/she/it | surfed |
| we | surfed |
| you | surfed |
| they | surfed |
| I | have | surfed |
|---|---|---|
| you | have | surfed |
| he/she/it | has | surfed |
| we | have | surfed |
| you | have | surfed |
| they | have | surfed |
| I | had | surfed |
|---|---|---|
| you | had | surfed |
| he/she/it | had | surfed |
| we | had | surfed |
| you | had | surfed |
| they | had | surfed |