madogawa ni suwatte, soto wo mimasu.

窓側 literally means the window side. In this sentence, it means the side near the window or by the window.

So 窓側に座って means something like:

• sit by the window
• sit on the window side

A similar word you may also see is 窓際, which also means by the window.

に is used here because 座る often takes に to mark the place where someone sits.

So:

• 椅子に座る = sit on a chair
• 窓側に座る = sit by the window

This is a common pattern with verbs like 座る, where に marks the destination or position someone settles into.

Because 座る usually goes with に, not で, when you mean the place where you sit down or are seated.

• に often marks a location/state you move into
• で often marks the place where an action happens

With 座る, Japanese normally uses に:

• そこに座ってください。 = Please sit there.

Using で with 座る would sound unnatural in this kind of sentence.

座って is the て-form of 座る. The て-form is often used to connect verbs.

So:

• 座って、外を見ます。

means:

• sit down / sit, and look outside

The て-form links the first action to the second one.

It can suggest either, depending on context.

In this sentence, 座って、外を見ます can naturally mean:

• I sit down and look outside
• I sit by the window and look outside
• I look outside while sitting by the window

Japanese often leaves this kind of small distinction to context. The sentence mainly presents the actions in a natural sequence.

Because 見る is a transitive verb, and the thing being looked at is marked with を.

So:

• 外を見る = look at the outside / look outside
• 空を見る = look at the sky
• 映画を見る = watch a movie

Even though English says look at or look outside, Japanese uses を with 見る for what is being seen.

外 means outside.

In 外を見ます, it means the speaker is looking at what is outside. In natural English, you would usually translate it as:

• look outside

rather than the more literal:

• look at the outside

The subject is omitted, which is very common in Japanese.

So the sentence could mean:

• I sit by the window and look outside.
• He sits by the window and looks outside.
• She sits by the window and looks outside.

The person is understood from context. Japanese often leaves out words like I, you, or he/she when they are already clear.

見ます is the polite non-past form.

That means it can refer to:

• the present
• the future
• a habitual action

Depending on context, this sentence could mean:

• I sit by the window and look outside.
• I will sit by the window and look outside.
• I usually sit by the window and look outside.

Japanese non-past forms are broader than English present tense forms.

The comma just shows a pause and makes the sentence easier to read.

• 窓側に座って外を見ます。
• 窓側に座って、外を見ます。

Both are possible. The comma does not change the basic meaning. It simply helps separate the two linked actions a little more clearly.