Na yi imani da wannan shirin.

Hausa aspect does not match English tense one-for-one. Na is the 1st-person singular completive form, but with some expressions, including yi imani, it commonly gives a present meaning like I believe or I have faith.

So even though it looks more completed than English present, Na yi imani is a normal way to say a current belief.

Yes, more or less.

• yi = do / make
• imani = belief / faith

Together, yi imani works as a single verbal expression meaning believe, have faith, or trust in. Hausa often uses this kind of light verb + noun structure.

Here, da introduces the thing that the speaker believes in.

So it is best to learn the pattern as:

yi imani da + noun

In other sentences, da can mean things like with, and, or have other functions, but in this expression it is just the normal connector required after yi imani.

wannan means this.

It points to a specific thing, so:

wannan shirin = this plan / this program

The basic noun is shiri. In a phrase like this, Hausa often uses a linked or definite-type form of the noun, and that frequently appears with a final -n.

So:

• shiri = plan, program
• wannan shirin = this plan / this program

This is a very common pattern in Hausa noun phrases.

It can mean either, depending on context. Common meanings include:

• plan
• arrangement
• preparation
• program

So this sentence could refer to believing in a plan, supporting a project, or having confidence in a program.

Usually it is closer to I believe in this plan, I have faith in this plan, or I trust this plan.

That is because yi imani da often expresses confidence, faith, or trust in something, not just accepting a fact as true.

Yes. The sentence breaks down like this:

• Na = I
• yi imani = believe / have faith
• da = introduces what is believed in
• wannan shirin = this plan / this program

So the structure is basically:

subject + verbal expression + da + noun phrase

Because Na yi imani is the more natural way to express a settled belief like I believe.

Ina yin imani would sound more like an ongoing or habitual act of believing, and it is usually not the best choice for a simple statement of belief in this kind of sentence.

A natural negative form is:

Ban yi imani da wannan shirin ba.

The negative pattern here is:

Ba-...-ba

So:

• Na yi imani ... = I believe ...
• Ban yi imani ... ba = I do not believe ...