Inversion involves reversing the usual word order of a sentence to create a different effect or emphasis. This can involve placing the verb before the subject or using a different word order to create a more dramatic or poetic effect. Inversion can be used to create emphasis, suspense, or to draw attention to a particular word or phrase.
Examples of inversion:
“Ask not what your country can do for you, ask what you can do for your country.” – This famous quote by John F. Kennedy uses inversion by placing the verb “ask” before the subject “what your country can do for you,” creating a more memorable and impactful statement.
“Fair is foul, and foul is fair” – This line from William Shakespeare’s “Macbeth” uses inversion to create a paradox and highlight the theme of moral ambiguity.
“Into the darkness they flew, their hearts beating fast with fear.” – This sentence from J.K. Rowling’s “Harry Potter and the Deathly Hallows” uses inversion by placing the prepositional phrase “into the darkness” before the subject “they flew,” creating a sense of suspense and unease.
“Never have I seen such a beautiful sunset.” – This sentence uses inversion by placing the adverb “never” before the auxiliary verb “have,” creating emphasis and highlighting the speaker’s awe.

That is correct. Everything after “Ask” is the direct object. Therefore, there is no inversion in the sentence. However, “Ask not” is stronger than “Do not ask.” This might be considered inversion, ‘main verb + not.”
The Kennedy quotation does not invert subject and verb: “ask” is the verb in the command form, the subject an understood but unwritten “you.” Everything after “ask” is the direct object. Arguably, the inversion is the “not”: “Don’t ask that, ask this” would be the expected syntax of a command about asking and not asking, so “ask not” sounds peculiar (and thus is memorable).
That is correct. Everything after “Ask is the direct object. Therefore, there is no inversion in the sentence. However, “Ask not” is stronger than “Do not ask.” This might be considered inversion, ‘main verb + not.”
I am confused between Anastrophe and Inversion
I guess basically their difference is that Anastrophe changes only the place of adjectives but Inversion can alter the whole structure.