Yes! the italian sonnet, also referred to as the petrarchan sonnet, and the shakespearean sonnet have several differences, the biggest of which being rhyme scheme and structure.
italian sonnets have a rhyme scheme which follows ABBAABBA CDECDE. with this, you'll see that the rhymes are split into 8 and 6, respectively. the structure of an italian sonnet is an octave followed by a sestet; the octave usually usually gives you an issue or a thought, and the sestet usually works to resolve it.
shakespearean sonnets, however, have a rhyme scheme that probably looks a little more familiar: ABAB CDCD EFEF GG. the rhymes in these are usually easier to follow. they're are split off into three quatrains followed by a rhyming couplet that closes out the sonnet with a sense of finality. an easy example is the prologue to romeo and juliet. these sonnets usually have a problem unfolding within the quatrains, then the couplet at the end packs you with a brief resolution.
Shall I compare thee to a summer's day?
Thou art more lovely and more temperate:
Rough winds do shake the darling buds of May,
<span>And summer's lease hath all too short a date: </span>
Sometime too hot the eye of heaven shines,
<span>And often is his gold complexion dimm'd; </span>
And every fair from fair sometime declines,
By chance, or nature's changing course, untrimm'd;
But thy eternal summer shall not fade
Nor lose possession of that fair thou ow'st;
Nor shall Death brag thou wander'st in his shade,
<span>When in eternal lines to time thou grow'st; </span>
So long as men can breathe or eyes can see,
<span>So long lives this, and this gives life to thee.</span>
If you mean in the sentence then it's the word 'never'