Formy mocne i słabe wyrazu "is"

Forma mocna [ɪz]

Is your name Peter? Yes, it is.
[ɪz jo: 'neɪm 'pi:tə] ['jes ɪt 'ɪz]

Formy słabe: [z], [s]

Who's that? It's Peter.
['hu:z 'ðæt] [ɪts 'pi: tə]

What's that?
['wɔts 'ðæt]

Where's my book?
['weəz maɪ 'buk]

He's a doctor.
[hi:z ə 'dɔktə]