If you sign in with your username, you'll need to migrate to a Mojang account. After clicking the change link, you'll be able to see if a username is available to you. If it shows that it is not available, you will not be able to change to that name.
Parallelism (grammar) In grammar, parallelism, also known as parallel structure or parallel construction, is a balance within one or more sentences of similar phrases or clauses that have the same grammatical structure. The application of parallelism improves writing style and readability, and is thought to make sentences easier to process.
Right: She wanted not only a hamburger but French fries. In the above example the first part of the pair, not only, joins the verb wanted. But the second part of the pair, but, joins the direct object French fries. The rule of parallel construction forbids the joining of a verb with a noun. Neither-Nor Mistakes. This rule of parallel construction applies to all the correlative conjunctions. Make sure the structure joined with the first word mirrors the structure joined with the second word.