In modern poetry, the word "flat and even" appears alternately in a sentence, resulting in cadence, and three flat and even words cannot appear at the end of the sentence.

In modern poetry, the words in a sentence should be flat and alternate, so as to cause cadence in tone, and three flat words cannot appear at the end of the sentence. This is a word that pays attention to the level and level requirements of modern poetry. The last sentence is about avoiding "three flat tails".

Modern poetry, also known as metrical poetry, was brewed in the Southern and Northern Dynasties and matured in the prosperous Tang Dynasty. Metric poetry refers to seven laws, seven unique, five laws and five unique. This kind of poems pay attention to flat and even lines, which not only requires the two flat and even lines in a couplet to be opposite to each other, but also requires the words in a sentence to be flat and even, not all flat and even lines. If there are three consecutive flat tails at the end of a poem, then three flat tails are taboo.

There are also three flat tails in the regular poems of Tang Dynasty. For example, "A Quiet Spring Mountain Sky in the Night" and "You Live with a Cloud" have three flat tails, while "Spring Mountain Sky" and "Lonely Cloud" are all flat-voiced characters. However, after the maturity of metrical poetry, this kind of problem basically does not appear. These poems with three flat tails are rare in Tang poetry, accounting for only about 1% according to statistics.

In metrical poetry, if you use continuous flat tones and three flat tones in a row, the melody will not change and appear flat, and the pitch will not change, so it will not sound harmonious and pleasant. As a kind of verse used for recitation, metrical poetry will naturally lose its charm once it loses its catchy sense of cadence. Therefore, we should try to avoid this kind of phonological combination that will produce a false sense of intonation.