The duality of words is fixed, commonly used and free.
Fixed antithesis, such as the first two sentences around Xijiang Moon. This fixed duality is rare.
Generally, antithesis is used (but not necessarily), such as the second and third sentences, the fourth and fifth sentences, the sixth and seventh sentences and the eighth and ninth sentences in Qinyuanchun; Third and fourth sentences, fifth and sixth sentences, seventh and eighth sentences. Another example is the five or six sentences before and after Nian Nujiao. Another example is the first two sentences after Huanxisha.
"Qinyuanchun" is the first two couplets of 4567, such as "Looking inside and outside the Great Wall, I am boundless; As soon as the river rises and falls, it loses its momentum. " After the 34562 couplet, job cherished the Qin emperor Hanwu and lost his literary talent slightly; Tang Zong Song Zu, slightly less coquettish. "This is a two-sentence confrontation, which is different from the general confrontation. Two antitheses like this are called >; Fan face ①.
Anyone who has the same number of words before and after two sentences has the possibility of confrontation. For example, the last two sentences before and after E, the fifth and sixth sentences before Shuidiao, the sixth and seventh sentences after Shuidiao, and so on. But these places are completely free to fight or not to fight.
There are two differences between antithesis of words and metrical poems. First, the antithesis of words is not necessarily equivalent, but equivalent. For example, "thousands of miles are frozen, Wan Li snow drifts", or "looking inside and outside the Great Wall, I am boundless; The river rises and falls, losing its momentum "(the city is flat on the river; Outside to the bottom, right). Second, the antithesis of words can make the same word relative. For example, A Thousand Miles of Ice is Frozen to Wan Li Snow Gone with the Wind, from Broken Horseshoe to Horn Swallowing, from Cangshan as the Sea to Sunset as the Blood.
Apart from these two points, the antithesis of words is the same as that of poetry.
The rhyme, level and antithesis of words are all changed on the basis of metrical poems. Therefore, to learn words, it is best to learn metrical poems first. After learning metrical poems, words become easy to understand.