Past tense of ascertain
regular verb
The past tense of ascertain is ascertained. The past participle is also ascertained.
Forms of ascertain
| Base form (V1) | ascertain /ˌæsəˈteɪn/ |
|---|---|
| Past tense (V2) | ascertained /ˌæsəˈteɪnd/ |
| Past participle (V3) | ascertained /ˌæsəˈteɪnd/ |
| Present participle | ascertaining |
| Third person singular | ascertains |
Ascertained in a sentence
- Measurement was by mildew infestation on rye, ascertained as % of the rained and unrained untreated control.1971, Proceedings of the British Insecticide & Fungicide Conference. From the entry unrained
- The mechanisms underlying the appearance of the parkinson-like symptoms during neuroleptic treatments are not ascertained.1965, Horizons in Neuropsychopharmacology, page 121. From the entry neuroleptic
- So I asked her to wait in the hall until I ascertained whether you had returned, m’lady”.1938, Gilbert Frankau, The Dangerous Years: A Trilogy, New York, N.Y.: E. P. Dutton & Co., Inc., book three (Present Day), chapter…. From the entry m'lady
- He has ascertained that a large number of "bottle-suckers" frequent this locality to consume beer.1924 January 2, The Geelong Advertiser, Victoria, page 2, column 5. From the entry bottle-sucker
- That this in fact was the case was ascertained by Dr.1901 December 20, H. Watkins-Pitchford, “Rinderpest”, in The Agricultural Journal and Mining Record, volume 4, number 21, pages 641–642. From the entry contagium
Meaning of ascertain
- verb To find out definitely; to discover or establish.
- verb To make (someone) certain or confident about something; to inform.
- verb To look for something lost.
Questions about the past tense of ascertain
- What is the past tense of ascertain?
- The past tense of ascertain is ascertained.
- What is the past participle of ascertain?
- The past participle of ascertain is ascertained.
- Is ascertain a regular or irregular verb?
- Ascertain is a regular verb: its past tense adds -ed.
Source and license
Adapted from Wiktionary: ascertain (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.
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Cite this page: “Past tense of ascertain.” Word.ws, https://word.ws/past-tense/ascertain. Based on Wiktionary, CC BY-SA 4.0.