Classical poetry is not restricted by meter except rhyme. In addition to rhyme, modern poetry is also restricted by meter.

Second, according to the number of words:

Modern poetry has only five words and seven words. There are four-character, five-character (five-character) and seven-character (seven-character) ancient poems with irregular words (seven-character ancient poems are also called seven-character), and there are also a few three-character and six-character poems.

Third, according to the number of sentences:

Classical poetry ranges from two sentences to one hundred. Modern poetry has four quatrains, eight rhymes and more than eight lines.

Four, according to the rhyme classification:

(a) ancient poetry:

1. The whole poem can use flat and oblique rhymes, and can also be changed into other rhymes at will.

2. Every sentence in the poem can be rhymed, and the rhymed words can be repeated.

3. Rhyme in poetry is not limited to even sentences, and odd sentences can also be used.

4. In poetry, we can communicate with neighboring rhymes and rising tones.

5. Allow sentences with plain culture.

(2) modern poetry:

1. A poem is limited to one rhyme. Except for the first sentence, which can rhyme or not, all other sentences rhyme even.

2. The rhyming words cannot be repeated.

3. The last word of a sentence doesn't need to rhyme, and a flat tone can't be the same as the last word of a rhyming sentence.

4. You can't use adjacent rhymes except the first sentence.

5. They all use flat rhymes.

There are four quatrains and eight rhyming poems.