Летом я надеваю майку, беру кепку и иду гулять в парк.

Летом is a very common Russian way to say in summer / during the summer.

It uses the instrumental case without a preposition. This is a standard pattern for seasons and some time expressions:

• летом = in summer
• зимой = in winter
• весной = in spring
• осенью = in autumn

So Летом я надеваю майку... means In the summer, I put on a tank top...

Using в is usually not the normal choice here. A learner should just memorize these seasonal adverb-like forms as very common set expressions.

Because they are direct objects, and in Russian direct objects often go into the accusative case.

Here:

• надеваю майку = I put on a tank top
• беру кепку = I take a cap

Both майка and кепка are feminine nouns ending in -а, so in the accusative singular they usually change:

• -а → -у
• майка → майку
• кепка → кепку

This is one of the most common Russian case patterns.

This is a classic Russian learner question.

• надевать / надеть = to put on an item of clothing
• одевать / одеть = to dress a person

So:

• Я надеваю майку. = I put on a tank top.
• Я одеваю ребёнка. = I dress the child.

A useful rule:

• надеть что? = put on what?
• одеть кого? = dress whom?

So надеваю майку is correct because майка is the clothing item being put on.

Беру is the imperfective verb, while возьму is perfective.

In this sentence, the speaker is describing a usual/summer routine, not one single completed action happening only once. Russian often uses the imperfective present for habits and repeated actions:

• Летом я надеваю майку, беру кепку и иду гулять в парк. = In summer, I put on a tank top, take a cap, and go for a walk in the park.

If you said возьму, that would sound more like a specific future or single completed action, not a general routine.

Because the sentence expresses both:

1. movement somewhere
2. the purpose of that movement

So:

• иду = I go / am going (on foot)
• гулять = to walk, stroll, spend time outside

Together, иду гулять means something like:

• I go for a walk
• literally: I go to walk

This structure is very common in Russian:

• иду есть = I’m going to eat
• пошёл спать = went to sleep
• поехали отдыхать = went to relax / went on vacation

So иду гулять в парк means I go to the park for a walk.

Because Russian distinguishes between:

• motion toward a place → в + accusative
• location inside a place → в + prepositional

So:

• иду в парк = I’m going to the park
• гуляю в парке = I’m walking in the park

In your sentence, the speaker is moving toward the park, so парк becomes парк in the accusative. For this noun, the accusative form looks the same as the nominative because it is inanimate masculine singular.

Both verbs relate to going on foot, but they are used differently.

• идти = to go, to be going in one direction, one occasion
• ходить = to go habitually, back and forth, or generally

In this sentence, иду works because the actions are presented as a kind of sequence:

• I put on a tank top,
• take a cap,
• and go for a walk in the park.

It sounds like a concrete outing.

If you said Летом я хожу гулять в парк, that would emphasize a habit more directly:

• In summer I go walking in the park / I go to the park for walks.

So иду is fine in a descriptive sentence like this, but хожу would slightly shift the focus toward repeated habit.

Most likely it describes a habitual action, especially because of летом.

In Russian, the present tense can often describe:

• what someone is doing now, or
• what someone usually does

Here, Летом strongly suggests a repeated summer routine:

• In summer, I put on a tank top, take a cap, and go for a walk in the park.

So even though the verbs are in the present tense, the meaning is more like what I usually do in summer.

Yes, very often.

Russian verb endings usually already show the subject:

• надеваю
• беру
• иду

These forms clearly mean I.

So you could say:

• Летом надеваю майку, беру кепку и иду гулять в парк.

That is natural Russian too.

Including я is also completely normal. It can make the sentence a little clearer, more balanced, or slightly more emphatic.

Because the sentence contains a series of actions:

• надеваю майку
• беру кепку
• иду гулять в парк

In Russian, commas are commonly used between coordinated verbs or clauses in a list like this, especially before the final и when earlier commas are already separating items in the sequence.

So the commas help show the structure:

• first I put on a tank top,
• then I take a cap,
• then I go for a walk in the park.

Майка usually means a sleeveless undershirt, tank top, or sometimes just a light sleeveless top depending on context.

It is not the same as футболка, which means T-shirt.

So:

• майка = tank top / undershirt
• футболка = T-shirt

In a summer sentence like this, майка suggests light casual clothing for warm weather.

Yes. Russian word order is more flexible than English word order.

The original sentence is very natural:

• Летом я надеваю майку, беру кепку и иду гулять в парк.

But other versions are possible, for example:

• Я летом надеваю майку, беру кепку и иду гулять в парк.
• Летом я иду гулять в парк, надеваю майку и беру кепку.

However, changing the word order can slightly change the emphasis or sound less natural depending on context.

The original version sounds smooth because it presents a clear sequence:

1. time frame (летом)
2. subject (я)
3. actions in logical order

So it is a good model sentence for a learner.