| I | pioneer |
|---|---|
| you | pioneer |
| he/she/it | pioneers |
| we | pioneer |
| you | pioneer |
| they | pioneer |
| I | pioneered |
|---|---|
| you | pioneered |
| he/she/it | pioneered |
| we | pioneered |
| you | pioneered |
| they | pioneered |
| I | have | pioneered |
|---|---|---|
| you | have | pioneered |
| he/she/it | has | pioneered |
| we | have | pioneered |
| you | have | pioneered |
| they | have | pioneered |
| I | had | pioneered |
|---|---|---|
| you | had | pioneered |
| he/she/it | had | pioneered |
| we | had | pioneered |
| you | had | pioneered |
| they | had | pioneered |
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