Present
| I | demethylate |
| You | demethylate |
| She | demethylates |
| We | demethylate |
| They | demethylate |
Past
| I | demethylated |
| You | demethylated |
| She | demethylated |
| We | demethylated |
| They | demethylated |
Perfect
| I | have | demethylated |
| You | have | demethylated |
| She | has | demethylated |
| We | have | demethylated |
| They | have | demethylated |
Future
| I | will | demethylate |
| You | will | demethylate |
| She | will | demethylate |
| We | will | demethylate |
| They | will | demethylate |
Past Perfect
| I | had | demethylated |
| You | had | demethylated |
| She | had | demethylated |
| We | had | demethylated |
| They | had | demethylated |
Future Perfect
| I | will | have | demethylated |
| You | will | have | demethylated |
| She | will | have | demethylated |
| We | will | have | demethylated |
| They | will | have | demethylated |
Present - Conditional
| I | would | demethylate |
| You | would | demethylate |
| She | would | demethylate |
| We | would | demethylate |
| They | would | demethylate |
Perfect - Conditional
| I | would | have | demethylated |
| You | would | have | demethylated |
| She | would | have | demethylated |
| We | would | have | demethylated |
| They | would | have | demethylated |