Learn Hardcore Hausa: Littafi mai kyau yana da amfani sosai.

In Hausa mai is a particle used to form adjectival (or relative) phrases from adjectives or verbs. Literally mai kyau means one who has goodness, so together it works like the English adjective good. You attach mai directly before the adjective to describe the noun.

Where do adjectives (or adjectival phrases) generally appear in Hausa?

Adjectives and adjectival phrases normally come after the noun they modify. So littafi mai kyau is literally book good‑one, i.e. a good book. English puts adjectives before nouns; Hausa puts them after, often with mai leading the phrase.

How does mai change when the noun is plural?

When the noun is plural, mai becomes masu to agree in number.
Singular: littafi mai kyau (a good book)
Plural: littattafai masu kyau (good books)

Why do we use yana da instead of just da, and what does yana da mean?

In Hausa yana da is the standard way to express “has” or “is equipped with.”

littafi yana da amfani = the book has usefulness = the book is useful.
The verb yana (he/it is) plus da (with) literally means “it is with,” i.e. “it has.”

Why is it yana and not tana in this sentence?

Hausa verbs agree in gender with their noun subjects. littafi (book) is grammatically masculine, so you use the third‑person masculine singular form yana. If the noun were feminine you'd use tana.

What does sosai mean, and why is it placed at the end of the sentence?

sosai is an intensifier meaning very or so much. In Hausa it usually follows whatever it modifies. Here it follows amfani to yield amfani sosai = very useful.

How would you make this sentence plural?

Adjust noun, adjective‑marker, and verb to plural:
Littattafai masu kyau suna da amfani sosai.

littattafai (books)
masu (plural of mai)
suna (they are/they have)

How would you form a negative version of this sentence?

Enclose the verb in ba … ba for negation:
Littafi mai kyau ba ya da amfani sosai.
= “A good book is not very useful.”

How can you turn this into a question?

You can add the question word Shin at the start or simply use rising intonation. For example:
Shin littafi mai kyau yana da amfani sosai?
= “Is a good book very useful?”