Quando piove, aspetto l’autobus sotto la pensilina.

In Italian, weather verbs usually do not need a subject pronoun. So piove means it is raining / it rains, even though there is no word for it.

• Piove = it rains / it’s raining
• Nevica = it snows
• Grandina = it hails

English needs a dummy subject (it), but Italian does not.

Italian often uses the present tense for actions that happen generally, habitually, or whenever a situation occurs.

So Quando piove, aspetto l’autobus sotto la pensilina means something like:

• When it rains, I wait for the bus under the shelter
• or Whenever it rains, I wait for the bus under the shelter

It is not necessarily talking about one specific moment right now. It describes a regular or typical situation.

Here, quando can be understood as when in a general sense, which in natural English is often close to whenever.

So in this sentence:

• Quando piove = When it rains / Whenever it rains

If the speaker is describing a habit, whenever is often the best way to understand it.

The comma separates the introductory clause from the main clause:

• Quando piove, = introductory time clause
• aspetto l’autobus sotto la pensilina = main clause

This is very natural in Italian, and it is also common in English:

• When it rains, I wait for the bus under the shelter.

You may sometimes see short clauses without a comma, but here the comma is standard and helpful.

Italian usually leaves out subject pronouns when they are not needed, because the verb ending already shows who the subject is.

• aspetto = I wait
• aspetti = you wait
• aspetta = he/she waits

So aspetto already tells us the subject is I, and io is normally unnecessary unless you want emphasis or contrast.

For example:

• Io aspetto, tu vai. = I’m waiting, you go.

It can mean either, depending on context.

In Italian, the simple present often covers both:

• I wait
• I am waiting

So aspetto l’autobus could mean:

• I wait for the bus
• I’m waiting for the bus

In this sentence, because of quando piove, it is most naturally understood as a habitual action: I wait for the bus under the shelter when it rains.

The apostrophe appears because the definite article il becomes l’ before a singular noun beginning with a vowel.

• il libro = the book
• l’autobus = the bus

So:

• aspetto l’autobus = I wait for the bus

The noun autobus is masculine, so the full article would be il, but before a it changes to l’.

Autobus is normally masculine in Italian.

So you say:

• l’autobus = the bus
• un autobus = a bus

Its plural usually stays the same in form:

• gli autobus = the buses

This is common with some borrowed words in Italian.

Pensilina is a feminine singular noun, so it takes the article la.

• la pensilina = the shelter / canopy / bus shelter covering

In this sentence, pensilina usually refers to the covered structure at a bus stop that protects people from rain or sun.

Pensilina usually means a shelter, canopy, or covered structure, especially at a bus stop or station.

In this sentence, sotto la pensilina means the speaker is standing under the covered bus-stop structure.

Depending on context, English translations might be:

• under the shelter
• under the bus shelter
• under the canopy

In Italian, you usually need the article with a noun in this kind of phrase.

So:

• sotto la pensilina = under the shelter

Leaving out the article would sound unnatural here.

Italian uses articles more often than English, so where English might say under shelter in some contexts, Italian normally says sotto la pensilina.

Sotto means under/beneath, and it emphasizes being physically under the covering.

• sotto la pensilina = under the shelter

You might hear nella pensilina in some contexts, but it would suggest being in the shelter as a space. For a bus stop covering, sotto la pensilina is the most natural way to say that you are standing under it for protection from rain.

Yes. In Italian, aspettare directly takes an object, unlike English wait for.

So:

• aspetto l’autobus = I wait for the bus

Not:

• aspetto per l’autobus ❌

This is a very common difference between English and Italian. Another example:

• Aspetto Maria. = I’m waiting for Maria.

The sentence order is very natural, but Italian is somewhat flexible.

Standard version:

• Quando piove, aspetto l’autobus sotto la pensilina.

You could also say:

• Aspetto l’autobus sotto la pensilina quando piove.

That still makes sense, but it slightly changes the rhythm and emphasis. Putting Quando piove first sets the situation immediately, which is why it sounds very natural here.

Usually, this sentence sounds like a general habit or usual behavior.

• Quando piove, aspetto l’autobus sotto la pensilina. = When(ever) it rains, I wait for the bus under the shelter.

If you wanted to describe a specific action happening right now, Italian would often make the context clearer in other ways, for example:

• Sta piovendo, quindi aspetto l’autobus sotto la pensilina. = It’s raining, so I’m waiting for the bus under the shelter.

So the original sentence is most naturally read as habitual or general.