| Tilstede (Present) "ascertain" | I | ascertain | |
| Present Continuous (Present Continuous) "ascertain" | I | am ascertaining | |
| Enkelt fortid (Simple past) "ascertain" | I | ascertained | |
| Past Kontinuerlig (Past Continuous) "ascertain" | I | was ascertaining | |
| Presens perfektum (Present perfect) "ascertain" | I | have ascertained | |
| Present perfekt kontinuerlig (Present perfect continuous) "ascertain" | I | have been ascertaining | |
| Past perfect (Past perfect) "ascertain" | I | had ascertained | |
| Past perfect kontinuerlig (Past perfect continuous) "ascertain" | I | had been ascertaining | |
| Framtid (Future) "ascertain" | I | will ascertain | |
| Future kontinuerlig (Future continuous) "ascertain" | I | will be ascertaining | |
| Future perfect (Future perfect) "ascertain" | I | will have ascertained | |
| Future perfekt kontinuerlig (Future perfect continuous) "ascertain" | I | will have been ascertaining |