Kesho tutasafiri ama kwa basi ama kwa treni, kutegemea hali ya hewa.

tutasafiri = tu- + -ta- + safiri

• tu- = we
• -ta- = future tense marker, will
• safiri = the verb stem travel

So tutasafiri means we will travel.

No extra preposition is needed. Kesho means tomorrow, and Swahili often uses time words directly without adding a word like on or in.

So:

• Kesho tutasafiri = Tomorrow we will travel

Putting Kesho first is very natural because it sets the time right away.

ama ... ama ... means either ... or ...

So:

• ama kwa basi ama kwa treni = either by bus or by train

This is a common way to present two alternatives in Swahili. In some contexts, you may also hear au for or, but ama ... ama ... is especially clear when expressing either/or.

It is repeated because each option keeps its own full prepositional phrase:

• kwa basi = by bus
• kwa treni = by train

So the structure is literally:

• either by bus or by train

Repeating kwa makes the sentence balanced and clear. It would sound less complete to mention kwa only once here.

Here, kwa is being used to express the means or mode of travel, similar to English by.

Examples:

• kwa basi = by bus
• kwa treni = by train

But kwa is a very flexible word in Swahili. In other sentences, it can also mean things like to, for, at, or indicate manner, depending on context.

When talking about transportation in Swahili, kwa is commonly used before the vehicle or means of travel.

So you get:

• kusafiri kwa basi = to travel by bus
• kusafiri kwa treni = to travel by train

This is just the standard pattern for expressing how someone travels.

Kutegemea is the infinitive form of the verb, meaning to depend or depending on, depending on context.

In this sentence, it works like:

• kutegemea hali ya hewa = depending on the weather

Swahili often uses the infinitive this way, where English might prefer a participle like depending.

Yes, in a broad sense that is the idea. But in this sentence, the best natural translation is depending on the weather because it connects to the main clause:

• Tomorrow we will travel either by bus or by train, depending on the weather.

If you wanted a full separate statement like It depends on the weather, Swahili would usually phrase that more explicitly.

hali ya hewa literally means something like condition of air/weather, but as a set phrase it simply means weather.

Breakdown:

• hali = condition, state
• ya = of
• hewa = air

So hali ya hewa is an expression you should learn as a whole.

Ya is the connective meaning of, and its form agrees with the noun before it.

Here the head noun is hali, and the correct connector with it is ya:

• hali ya hewa = condition of air / weather

This connector changes in other noun classes, so learners often need time to get used to it.

The comma helps show that the last part is an added idea: depending on the weather.

It is useful in writing, but Swahili punctuation is sometimes less rigid than English punctuation in everyday use. Even without the comma, the meaning would usually still be understood.

Swahili word order is somewhat flexible, but this sentence is very natural as written.

Current order:

• Kesho tutasafiri ama kwa basi ama kwa treni, kutegemea hali ya hewa.

This flows well because it gives:

1. the time
2. the action
3. the alternatives
4. the condition

You could move some parts for emphasis, but this version is straightforward and idiomatic for learners.

Yes. Ama can mean simple or in many contexts. But when it appears in the pattern ama X ama Y, it clearly means either X or Y.

So in this sentence:

• ama kwa basi ama kwa treni = either by bus or by train

Because Swahili usually puts the subject inside the verb itself.

In tutasafiri:

• tu- already means we

So a separate subject pronoun is not necessary. You can add sisi for emphasis, but normally it is omitted:

• Kesho tutasafiri = Tomorrow we will travel
• Sisi kesho tutasafiri = We, tomorrow, will travel / As for us, we will travel tomorrow

It suggests the trip will happen, but the exact means of travel is not fixed yet.

So the meaning is:

• We will travel tomorrow
• but whether by bus or by train depends on the weather

That uncertainty is expressed by:

• ama ... ama ... = two possible options
• kutegemea hali ya hewa = depending on the weather