It would mean to have different types and lengths of sentences, some short and some long sentences.
means to change the structure of sentence
What does it mean to vary the sentence pattern within a written work?
The significance of keyword replacements for "is" in a sentence is to vary sentence structure and improve readability by avoiding repetition.
Sentence Structure
No, the thesis does not have to be the last sentence in an academic paper. It is typically found in the introduction, but its placement can vary depending on the structure and style of the paper.
If by 'this structure' we're talking about sentence structure, then what is unacceptable is the ambiguity as regards what the actual subject of the sentence is. The ambiguity has to do with the fact that 'this structure' can also mean the structure of a building or other physical object; if that's the case, then this question could be trashed with the comment, "Not enough information to answer."
kinds of sentence according to structure
No, the thesis statement does not have to be the last sentence in an academic paper. It is typically found in the introduction, but its placement can vary depending on the structure and style of the paper.
What sentence structure is this? - It is a simple structure for an interrogative sentence.
In that sentence, you can replace the word structure with the word mass, so that the question reads:"All but two percent of Antarctica's land mass is covered by ice."
The structure of the cake was high.
"do" in Chinese can have various meanings depending on the context. It can mean "to do" or "to work", or it can be part of a phrase or sentence structure to indicate a question or emphasis.