Learn Hardcore Turkish: Yeni ürünün prototipini geliştirdik ve test etmeliyiz. - We have developed a prototype of the new product, and we must test it.

It shows that the prototype belongs to the new product. "Ürünün" is "ürün" (product) with the genitive suffix -ün, meaning "of the product", and "prototipini" is formed by adding a possessive/object marker which indicates that it is the definitive object of that product. This construction replaces the need for an "of" phrase as used in English.

How is the past tense formed in "geliştirdik"?

"Geliştirdik" comes from the verb "geliştirmek" (to develop). The suffix -dik is attached to the verb stem to mark the past tense for the first-person plural, meaning "we developed." Turkish verbs include information about the subject and tense in their endings, so the subject "we" is implied without being stated explicitly.

What does "test etmeliyiz" mean and how is it structured?

"Test etmeliyiz" means "we must test" or "we should test." It is built from the verb "test etmek" (to test) plus the modal suffix -meliyiz, which expresses obligation or necessity. This modal formation directly conveys that testing the prototype is a required next step.

Why is the subject not explicitly stated in the sentence?