| I | titter |
|---|---|
| you | titter |
| he/she/it | titters |
| we | titter |
| you | titter |
| they | titter |
| I | tittered |
|---|---|
| you | tittered |
| he/she/it | tittered |
| we | tittered |
| you | tittered |
| they | tittered |
| I | have | tittered |
|---|---|---|
| you | have | tittered |
| he/she/it | has | tittered |
| we | have | tittered |
| you | have | tittered |
| they | have | tittered |
| I | had | tittered |
|---|---|---|
| you | had | tittered |
| he/she/it | had | tittered |
| we | had | tittered |
| you | had | tittered |
| they | had | tittered |
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