Past Tense of Shear
“Shear” has a clear role split: use “sheared” for the ordinary simple past, while dictionaries record “sheared” and “shorn” as past-participle forms. Keeping those grammatical roles separate prevents “shorn” from being taught as the ordinary simple past.
The simple past of “shear” is “sheared.” The past participle can be “sheared” or “shorn.”
Key details
Choose the right form
| Meaning / situation | Form / construction | Decision |
|---|---|---|
| completed action in simple past | sheared | Use “sheared.” |
| past participle | sheared / shorn | Both are dictionary-recorded participles. |
| present/base form | shear / shears | Use a present form when the clause is not past. |
Quick tests
Verb-form test
Do you need the simple past of “shear”?
If yes: Use “sheared.”
If no: If you need a past participle, use a documented participle form such as “sheared” or “shorn.”
Caveat: Past tense and past participle are different grammatical roles here; “shorn” should not be promoted into the ordinary simple-past slot.
Examples
The crew sheared the sheep before noon.
“Sheared” is the simple past.
The sheep had been shorn before the storm arrived.
“Shorn” is a documented past participle.
The machine has sheared the edge cleanly.
“Sheared” is also a documented past participle.
Further guidance
Core difference
Use “sheared” for a completed past action. Reserve “shorn” for a participle construction rather than an ordinary simple-past slot.
Fast Test
If the clause is simple past, choose “sheared”; if it needs a past participle, “sheared” or “shorn” may be available according to the construction.
Usage Boundary
Do not teach “shorn” as the ordinary simple past merely because it is a past participle.
Sources and evidence
Sources are shown with the role they play in this guide. Historical or style-sensitive claims are kept within the evidence boundary described above.
- SHEAR Definition & Meaning - Merriam-Webster (opens in a new tab)Merriam-Webster · Merriam-Webster records shear as sheared; sheared or shorn; shearing, establishing sheared as the simple-past form and sheared/shorn as participial forms.
- shear — Cambridge Dictionary (opens in a new tab)Cambridge University Press · Definitions and verb role of shear