An imperative sentence is a type of sentence that gives a command, instruction, or request. It often starts with a verb and may or may not include the subject, which is typically implied as "you." For example, "Close the door" and "Please pass the salt" are both imperative sentences. They convey a directive rather than a statement or question.
A mischievous imp? Someone small and somewhat clever in the midst of causing small but somewhat clever trouble, I would think. As an aside, that little phraselet isn't vintage slang. It isn't even slang. It's just words. Look 'em up!
It in symmetry with sentence a is what? What is a sentence with symmetry in it? This sentence with symmetry is symmetry with sentence this.
It is the first sentence of a paragraph which is the topic sentence.
Who or what the sentence is about is the subject of the sentence.
Who or what the sentence is about is the subject of the sentence.
The subject of a sentence is who or what that sentence is about.
yes
the meaning of sentence is sentence
A subject in a sentence is who, what, or where the sentence is about.
compound sentence, simple sentence, and complex sentence
a descriptive sentence is a sentence that describes something in one sentence
As a question, it can be a sentence, like: A sentence can have one word, and as a question then it can be a sentence: Who?