Word.ws English Dictionary

Past tense of base

regular verb

The past tense of base is based. The past participle is also based.

Forms of base

Base form (V1)base /beɪs/
Past tense (V2)based /beɪst/
Past participle (V3)based /beɪst/
Present participlebasing /ˈbeɪsɪŋ/
Third person singularbases /ˈbeɪsɪz/

Based in a sentence

  • Troops have been based in Munich since the end of World War II.
  • The continuous profitability of the company is based on its many proprietary products.From the entry proprietary
  • There's a massive iceberg of increasingly crazy fanfics out there based around those two characters.From the entry iceberg
  • Based on this data, it is our belief that X does not occur.From the entry belief
  • Your view on evolution is based on religious doctrines, not on scientific findings.From the entry view

Meaning of base

  1. noun Something from which other things extend; a foundation.
  2. noun A supporting, lower or bottom component of a structure or object.
  3. noun The starting point of a logical deduction or thought; basis.

Full definition of base

Questions about the past tense of base

What is the past tense of base?
The past tense of base is based.
What is the past participle of base?
The past participle of base is based.
Is base a regular or irregular verb?
Base is a regular verb: its past tense adds -d.

Source and license

Adapted from Wiktionary: base (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.

Last updated:

Cite this page: “Past tense of base.” Word.ws, https://word.ws/past-tense/base. Based on Wiktionary, CC BY-SA 4.0.