Tafadhali weka kitabu humo.

Tafadhali means please.

It makes the command more polite:

• Weka kitabu humo. = Put the book in there.
• Tafadhali weka kitabu humo. = Please put the book in there.

You do not have to use it, but without it the sentence sounds more direct.

Weka is the verb to put / to place.

In this sentence, weka is in the singular imperative form, meaning it is a command directed at one person:

• weka! = put!

So Tafadhali weka kitabu humo literally starts with Please put...

It is not stated, because this is a command.

Just like in English you can say:

• Put the book in there.

instead of

• You, put the book in there.

Swahili usually leaves out you in commands because it is already understood.

It can mean either, depending on context.

Swahili does not usually use articles like a, an, and the. So:

• kitabu can mean a book
• kitabu can also mean the book

The situation tells you which meaning is intended.

Humo means in there, inside there, or therein.

It refers to a place that has already been identified or is obvious from context, especially a place with an inside, such as:

• a box
• a bag
• a room
• a drawer

So weka kitabu humo means not just put the book there, but more specifically put the book in there.

Because humo already includes that idea.

In English, you say:

• in
  • there

In Swahili, humo combines those ideas into one word: in there.

So the sentence does not need a separate preposition before humo.

This is a very normal Swahili word order:

• weka = put
• kitabu = book
• humo = in there

So the pattern is:

• verb + object + location

That is very natural in Swahili. A word-for-word breakdown would be:

• Tafadhali = please
• weka = put
• kitabu = book
• humo = in there

Yes. Kitabu belongs to the ki-/vi- noun class.

• singular: kitabu = book
• plural: vitabu = books

This matters because other words in the sentence may agree with it in longer phrases. For example:

• kitabu kikubwa = big book
• vitabu vikubwa = big books

In your sentence, you mainly just need to recognize kitabu as the singular form.

Yes. It is often placed at the beginning, but it can also come later.

For example:

• Tafadhali weka kitabu humo.
• Weka kitabu humo, tafadhali.

Both are correct. Putting tafadhali first is very common and sounds natural.

A simple pronunciation guide is:

• Tafadhali = ta-fa-DHA-li
• weka = WEH-ka
• kitabu = kee-TAH-boo
• humo = HOO-mo

A few useful pronunciation notes:

• dh sounds like the th in this
• Swahili vowels are usually pure and consistent:
  • a = ah
  • e = eh
  • i = ee
  • o = oh
  • u = oo
• Stress is usually on the second-to-last syllable

So the whole sentence is roughly:

ta-fa-DHA-li WEH-ka kee-TAH-boo HOO-mo