It is called Iambic Pentameter, a common meter in poetry consisting of an unrhymed line with five feet or accents, each foot containing an unaccented syllable and an accented syllable
meter or iambic pentameter
Yes, English sonnets are almost always written in iambic pentameter. In fact, this is true of all sonnets, even the Italian ones from which the English writers drew their inspiration. Shakespeare used this metre throughout his work as well as in the sonnets.
sonnets
some of them were called sonnets
The rhythm of a poem is called meter.
Shakespearean sonnets - sonnets by Shakespeare
It's called the "rhythm."
He probably wanted to change the meaning because the rhythm changed in the last couplet. It also adds contrast to the poem in general.
Yes, it's in my book which is called "Shakespeare's Sonnets"
Shakespearean sonnets - sonnets by Shakespeare
Rhythm that does not follow formal patterns is called
No sonnet is a limerick. Sonnets have 14 lines; limericks have 5. Sonnets are written in iambic pentameter; limericks have a characteristic rhythm consisting of two lines composed of an iamb and two spondees followed by two lines of an iamb followed by a spondee and a last line in the same rhythm as the first. Limericks always have the rhyme scheme aabba. Sonnets are usually ababcdcdefefgg or abbaabbacdecde or some similar scheme. A limerick clearly is not The same kind of poem you thought Without fourteen lines And that pattern of rhymes It's not a sonnet, it's sonnot.