Learn Hardcore Hausa: Ku saurari ra'ayi na. - You plural listen to my opinion.

With ku / ka / ki: the command can sound more explicit, sometimes more forceful or formal .
Without them: it can sound slightly softer and is very common in speech.

Ku – you (plural), used for:
- more than one person, or
- polite/formal you (even to one person, in some contexts)
saurari – listen to / pay attention to (a verb that takes an object)
ra'ayi – opinion, view, idea
na – my (possessive pronoun)

So the literal structure is: You (pl) listen-to opinion my.
Natural English: Listen to my opinion.

Why is ku used here? Is it plural you or polite you?

Ku is the 2nd person plural subject pronoun used in imperatives. It usually implies:

You all / you guys (speaking to several people), or
Polite / respectful you when addressing one person formally (e.g. a stranger, elder, or someone you respect), depending on context and dialect.

So Ku saurari ra'ayi na. is either:

You all, listen to my opinion, or
(Polite) Please listen to my opinion, said respectfully to one person or a group.

How would I say “Listen to my opinion” to just one person (informally)?

For one person, Hausa distinguishes masculine and feminine: