Learn Hardcore Hausa: Ƙwari suna cikin lambu. - Insects are inside the garden.

In this sentence, suna is the form that goes with a plural subject and expresses a present state/location. With ƙwari (insects), it works a lot like English are in are in the garden.

Why is the word order ƙwari suna cikin lambu?

This is the normal Hausa pattern:

subject + verbal/agreement form + location phrase

So:

ƙwari = the subject
suna = the present plural form
cikin lambu = the place phrase

That makes the sentence sound natural in Hausa.

Is ƙwari singular or plural?

ƙwari is plural. The singular is usually ƙwaro.

So:

ƙwaro = one insect
ƙwari = insects

Why does the plural change from ƙwaro to ƙwari instead of just adding something like English -s?

Because Hausa plural formation is often irregular. There is no single ending that works for every noun. Many nouns form their plurals in different ways, so learners often need to memorize singular and plural together.