The past tense of "dark" when used as a verb (to make or become dark) is darkened, as in "The sky darkened" or "His face darkened with anger," but "dark" itself is usually an adjective or noun, not a verb needing a simple past tense like "darked," which is less common but seen in some verb conjugations.
"Darkened" is the past participle of the word "dark," a participle being the "ed" or "ing" form of a verb. In the example you give, "darkened" functions as an adjective and indicates the tense of the word "dark." This shows how it functions in time: the room used to be light but, over a period of time, became dark.
V1- fly V2-flew V3- flown.
In fact, many dictionaries specifically say that “daresay” is generally used in the first-person singular present tense (“I daresay”). However, the Oxford English Dictionary notes that “some dialects make the past daresaid, darsayed, dessayed.” The term is “durst say” in the OED's only past-tense example: “La Fleur …
The twelve tenses in English are as follows:
The past tense of tell is "told" because it's an irregular verb.
The Dark Past is a 1948 American film noir psychological thriller film starring William Holden, Nina Foch, and Lee J. Cobb. Directed by Rudolph Maté, the Columbia Pictures release is a remake of Blind Alley (1939), also released by Columbia, and based on a play by American dramatist James Warwick.
darken verb (GET DARKER)
(of a place or the sky) to become dark: The sky darkened as thick smoke billowed from the blazing oil well.
Verb. The past tense and past participle of haunt.
There are four past tense forms: the past simple (e.g., “you cooked”), the past progressive (e.g., “he was singing”), the past perfect (e.g., “I had arrived”), and the past perfect progressive (e.g., “They had been driving”).
Dark, dim, obscure, gloomy, murky refer to absence or insufficiency of light. Dark implies a more or less complete absence of light: a dark night.
Say and tell are irregular verbs. The past simple of say is said, the past simple of tell is told: They asked if I was looking for work and I said yes. Then he told me how he had got the job by lying about his age.
The past tense of dare is dared.
A tense that expresses an action that is currently happening is known as the Present tense. Simple present tense denotes an action that happens regularly. They are also called the present indefinite tense. The sentence structure is Subject + Verb (s/es) + Object.
The perfect tense or aspect (abbreviated PERF or PRF) is a verb form that indicates that an action or circumstance occurred earlier than the time under consideration, often focusing attention on the resulting state rather than on the occurrence itself. An example of a perfect construction is I have made dinner.
When you shift verb tenses for no reason, and this is an easy mistake to make, you can really confuse your readers. If you're writing in the present tense, be sure you stay in the present tense. If you're writing in the past tense, be sure you stay in the past tense.
dares. The plural form of dare; more than one (kind of) dare. I bet you can't finish the dares.
You say 'how dare you' when you are very shocked and angry about something that someone has done. How dare you pick up the phone and listen in on my conversations!
You use ' dare I say it' when you know that what you are going to say will disappoint or annoy someone. My life has become predictable and, dare I say it, just a little dull.