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Indicative |
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| Present |
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| I | ascertain | | you | ascertain | | he/she/it | ascertains | | we | ascertain | | you | ascertain | | they | ascertain |
| | Present Progressive |
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| I | am ascertaining | | you | are ascertaining | | he/she/it | is ascertaining | | we | are ascertaining | | you | are ascertaining | | they | are ascertaining |
| | Past |
|---|
| I | ascertained | | you | ascertained | | he/she/it | ascertained | | we | ascertained | | you | ascertained | | they | ascertained |
| | Past Progressive |
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| I | was ascertaining | | you | were ascertaining | | he/she/it | was ascertaining | | we | were ascertaining | | you | were ascertaining | | they | were ascertaining |
|
| Perfect |
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| I | have ascertained | | you | have ascertained | | he/she/it | has ascertained | | we | have ascertained | | you | have ascertained | | they | have ascertained |
| | Perfect Progressive |
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| I | have been ascertaining | | you | have been ascertaining | | he/she/it | has been ascertaining | | we | have been ascertaining | | you | have been ascertaining | | they | have been ascertaining |
| | Pluperfect I |
|---|
| I | had ascertained | | you | had ascertained | | he/she/it | had ascertained | | we | had ascertained | | you | had ascertained | | they | had ascertained |
| | Pluperfect II |
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| I | had ascertained | | you | had ascertained | | he/she/it | had ascertained | | we | had ascertained | | you | had ascertained | | they | had ascertained |
| | Future I |
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| I | will ascertain | | you | will ascertain | | he/she/it | will ascertain | | we | will ascertain | | you | will ascertain | | they | will ascertain |
| | Future II |
|---|
| I | am going to ascertain | | you | are going to ascertain | | he/she/it | is going to ascertain | | we | are going to ascertain | | you | are going to ascertain | | they | are going to ascertain |
| | Future Progressive |
|---|
| I | will be ascertaining | | you | will be ascertaining | | he/she/it | will be ascertaining | | we | will be ascertaining | | you | will be ascertaining | | they | will be ascertaining |
| | Future Perfect |
|---|
| I | will have ascertained | | you | will have ascertained | | he/she/it | will have ascertained | | we | will have ascertained | | you | will have ascertained | | they | will have ascertained |
| |
|
|
Conditional |
|---|
| Present |
|---|
| I | would ascertain | | you | would ascertain | | he/she/it | would ascertain | | we | would ascertain | | you | would ascertain | | they | would ascertain |
| | Progressive |
|---|
| I | would be ascertaining | | you | would be ascertaining | | he/she/it | would be ascertaining | | we | would be ascertaining | | you | would be ascertaining | | they | would be ascertaining |
| | Past Progressive |
|---|
| I | would have been ascertaining | | you | would have been ascertaining | | he/she/it | would have been ascertaining | | we | would have been ascertaining | | you | would have been ascertaining | | they | would have been ascertaining |
|
|
Subjunctive |
|---|
| Present |
|---|
| I | ascertain | | you | ascertain | | he/she/it | ascertains | | we | ascertain | | you | ascertain | | they | ascertain |
| | Present Perfect |
|---|
| I | have ascertained | | you | have ascertained | | he/she/it | has ascertained | | we | have ascertained | | you | have ascertained | | they | have ascertained |
| | Past |
|---|
| I | ascertained | | you | ascertained | | he/she/it | ascertained | | we | ascertained | | you | ascertained | | they | ascertained |
| | Pluperfect I |
|---|
| I | had ascertained | | you | had ascertained | | he/she/it | had ascertained | | we | had ascertained | | you | had ascertained | | they | had ascertained |
|
| Past |
|---|
| I | ascertained | | you | ascertained | | he/she/it | ascertained | | we | ascertained | | you | ascertained | | they | ascertained |
| | Pluperfect II |
|---|
| I | had ascertained | | you | had ascertained | | he/she/it | had ascertained | | we | had ascertained | | you | had ascertained | | they | had ascertained |
| |
Imperative |
|---|
| Imperative |
|---|
| you | ascertain | | he/she/it | ascertain | | we | let us ascertain | | you | ascertain | | they | ascertain |
| | Negative Imperative |
|---|
| you | do not ascertain | | he/she/it | do not ascertain | | we | let us not ascertain | | you | do not ascertain | | they | do not ascertain |
|
