Learn Turkish: Bu pahalı faturayı ödemedim. - I didn't pay this expensive bill.

It combines four parts: the verb stem öde (pay), the negative suffix -me (not), the past tense suffix -di (did), and the personal ending -m (I). Notice how vowel harmony connects them perfectly: the 'e' in öde requires the e-type negative -me, and the 'e' in -me requires the i-type past tense -di.

Why is there an extra -ı at the end of faturayı?

This marks the word as a specific direct object (the accusative case). Because you are talking about paying this specific bill (bu fatura), Turkish requires you to tag it as the exact target of your action. If you were just saying "I didn't pay a bill" in general, it would remain just fatura.

Where does the -y- in faturayı come from?

The base word for bill is fatura, which ends in a vowel. The specific object ending we need to attach is also a vowel (-ı). Because Turkish avoids putting two vowels right next to each other, we insert the buffer consonant -y- to smoothly connect them.

Is the word order for bu pahalı faturayı exactly the same as English?