Present
| I | hiss |
| You | hiss |
| She | hisses |
| We | hiss |
| They | hiss |
Past
| I | hissed |
| You | hissed |
| She | hissed |
| We | hissed |
| They | hissed |
Perfect
| I | have | hissed |
| You | have | hissed |
| She | has | hissed |
| We | have | hissed |
| They | have | hissed |
Future
| I | will | hiss |
| You | will | hiss |
| She | will | hiss |
| We | will | hiss |
| They | will | hiss |
Past Perfect
| I | had | hissed |
| You | had | hissed |
| She | had | hissed |
| We | had | hissed |
| They | had | hissed |
Future Perfect
| I | will | have | hissed |
| You | will | have | hissed |
| She | will | have | hissed |
| We | will | have | hissed |
| They | will | have | hissed |
Present - Conditional
| I | would | hiss |
| You | would | hiss |
| She | would | hiss |
| We | would | hiss |
| They | would | hiss |
Perfect - Conditional
| I | would | have | hissed |
| You | would | have | hissed |
| She | would | have | hissed |
| We | would | have | hissed |
| They | would | have | hissed |