Word.ws English Dictionary

Past tense of investigate

regular verb

The past tense of investigate is investigated. The past participle is also investigated.

Forms of investigate

Base form (V1)investigate /ɪnˈvɛs.tə.ɡeɪt/
Past tense (V2)investigated
Past participle (V3)investigated
Present participleinvestigating
Third person singularinvestigates

Investigated in a sentence

  • We investigated the presence of CNM in ornithophagous ticks from migrating birds.2015 July 25, “Candidatus Neoehrlichia mikurensis in Ticks from Migrating Birds in Sweden”, in PLOS ONE, →DOI
  • Most reports of supernatural occurrences turn out to be flim-flam when carefully investigated.From the entry flim-flam
  • The police closed off the street while they investigated the murder scene.From the entry close off
  • The police cordoned off the street while they investigated the accident.From the entry cordon off
  • When Uff investigated Southall, the concept of crumple zones in rolling stock was slowly becoming established.2020 October 7, Philip Haigh, “From Southall to Carmont... how to keep passengers safe”, in Rail, page 46. From the entry crumple zone

Meaning of investigate

  1. verb To inquire into or study in order to ascertain facts or information.
  2. verb To examine, look into, or scrutinize in order to discover something hidden or secret.
  3. verb To conduct an inquiry or examination.

Full definition of investigate

Questions about the past tense of investigate

What is the past tense of investigate?
The past tense of investigate is investigated.
What is the past participle of investigate?
The past participle of investigate is investigated.
Is investigate a regular or irregular verb?
Investigate is a regular verb: its past tense adds -d.

Source and license

Adapted from Wiktionary: investigate (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 investigate.” Word.ws, https://word.ws/past-tense/investigate. Based on Wiktionary, CC BY-SA 4.0.