First, the structure of the first sentence:
1 starts with a dot, which leads to the whole poem and the following description of what.
Pave the way for what is described below.
Render a certain atmosphere, contrast a certain mood and lay a certain tone for poetry.
The first question will be fascinating or thought-provoking.
Second, the structure and function of the intermediate sentence (transfer sentence):
1, transition, connecting the preceding with the following,
2. foreshadowing
Step 3 change the subject
Third, the structure and function of the last sentence:
1 Summarize the whole poem and deepen or sublimate the theme.
2 pawn Zhang Xianzhi, point out the theme.
Give consideration to the above or topics, echo before and after, and make the poetry structure rigorous.
The lines between the lines are full of profound meaning, which makes people memorable.