Past Tense of “slide”
The past tense of slide is slid; the past participle is slid.
Why “slide” behaves this way
"Slide" comes from Old English "slidan," a Class I strong verb whose ablaut pattern originally ran slidan/slad/slidon/sliden — a long "i" in the present, a long "a" in the singular past, and a short "i" again in the plural past and participle. Modern English collapsed that four-way vowel dance into just two surviving forms, "slide" and "slid," with the old participle "slidden" essentially extinct outside a few dialectal pockets and dictionaries that list it as archaic.
The disappearance of "slidden" is a useful case study in how English simplifies irregular paradigms over centuries without regularizing them completely: rather than replacing "slid" with "slided," speakers simply let the past simple form do double duty as the participle too, the same shortcut that happened to "sit/sat/sat" and "stand/stood/stood." This partial simplification — merging forms instead of erasing irregularity outright — is far more common historically than full regularization to "-ed."
The common confusion
Because "slid" now covers both slots, writers sometimes second-guess themselves and reach for a nonstandard "slidden" or an invented "slided" when writing formally, assuming a single short verb like "slid" can't possibly be correct in the perfect tense — but "has slid" is exactly right and has been standard for well over a century. Some dictionaries still list "slidden" as a rare or archaic alternate participle, which can mislead careful writers into thinking it's the preferred formal choice; in practice, virtually no working style guide or edited publication uses it, and reaching for it in modern prose reads as an affectation rather than correct formality.
How it's actually used
"Slide" shows up heavily in figurative use beyond its literal sense of moving smoothly across a surface: prices "slide," opinions "slide," and standards "slide," all metaphorically extending the idea of frictionless, often unwanted downward movement. In each of these figurative senses the irregular conjugation carries over unchanged — "prices slid last quarter" is standard business writing, not a slip. The noun "slide" (a photographic transparency, a playground structure, a single page of a presentation) is spelled identically to the verb's base form, which occasionally causes momentary parsing confusion in headlines like "Company Slide Continues," where a reader has to decide whether "slide" is functioning as a noun (a continuing downward trend) or a present-tense verb form before the sentence resolves.
Across the tense system
Because past simple and past participle share the identical form "slid," this verb is unusually forgiving in mixed-tense writing: a sentence like "the box had slid across the floor before I slid the chair back" never risks a form mismatch the way "speak/spoke/spoken" would if a writer confused the two slots. That said, the auxiliary still matters: "has slid" (perfect) versus "slid" (simple past) signal different time relationships even though the verb form itself doesn't change. The passive voice also works cleanly with this verb in its causative sense — "the drawer was slid shut" — even though "slide" is more often intransitive than transitive, showing that the single merged form flexes across both grammatical voices without strain.
Common real mistakes
The most common real error is "slidded" or "slided," typically from writers half-remembering that most English verbs take "-ed" and assuming a short, simple-looking verb like this one must follow suit. A second, subtler error is using "slid" where the noun "slide" is meant, especially in phrases like "a slid in prices" instead of the grammatically necessary "a slide in prices." A third, less obvious mistake shows up in headline writing, where reporters drop the auxiliary for compactness ("Stocks Slide Amid Fears") using the present tense to describe a past event, a stylistic convention called the headline present rather than a grammatical error — but writers sometimes carry that habit mistakenly into body text, where full past-tense "slid" is required.
Examples
- The book slid off the table.
- Prices have slid steadily since the announcement.
- She slid the note under the door.
- The car slid on the icy road before the driver regained control.
- Sales had already slid by the time the report came out.
- He slid into home plate just in time.
Memory trick
Think of "slid" as a snapshot with the last frame cut off: "slide" loses its "e" and its vowel shortens, like a photo of the word mid-motion. Since "slid" fills both the past-simple and participle slots, you never have to remember a third form — one less thing to trip over.