Iambic is the most commonly used in English poetry, and 90% of English poetry is written in iambic.
As we know, all English words with more than two syllables are divided into stressed syllables and light syllables. In a sentence, according to the requirements of grammar, intonation and semantics, some words should be stressed and some words should be read lightly. For example, he went to town to buy a book. I'm glad to hear that. English is divided into stressed syllables and light syllables. Stressed syllables and light syllables are combined according to a certain pattern and repeatedly combined into a poem, which sounds cadence and cadence, forming the rhythm of poetry. Disyllabic words have stress and secondary stress, which can be regarded as stress and light reading according to rhythm.