watasi ha natu no asa ga tokuni suki desu.

They are doing different jobs.

• 私 は sets the topic: as for me
• 夏の朝 が marks the thing being described as liked

So the sentence is structured more like:

• As for me, summer mornings are especially liked
• More natural English: I especially like summer mornings

This is very common in Japanese: one part is the topic, and another part is the grammatical subject of the predicate.

Because 好き is not a regular action verb like 食べる or 見る.

好き behaves like a na-adjective / adjectival noun, so the thing that is liked is usually marked with が, not を.

Compare:

• りんごを食べます = I eat apples
• りんごが好きです = I like apples

A helpful way to think about it is that 好き means something like likable / pleasing rather than the action to like.

夏の朝 means summer mornings or the mornings of summer.

Breakdown:

• 夏 = summer
• の = links nouns together
• 朝 = morning

So 夏の朝 literally means summer's mornings or morning(s) in summer.

In natural English, we usually say summer mornings.

の connects one noun to another.

In 夏の朝, it shows that 朝 is being specified by 夏:

• 夏 = summer
• 朝 = morning
• 夏の朝 = a morning in summer / summer morning

This use of の is extremely common. It can show possession, category, description, location-like relationships, and more.

Examples:

• 日本の車 = Japanese car / car from Japan
• 学校の先生 = school teacher / teacher at a school
• 朝のコーヒー = morning coffee

特に means especially.

It comes before the part it modifies, so here it modifies 好きです:

• 特に好きです = especially like

So the sentence means that among various things the speaker likes, summer mornings stand out in particular.

You can think of the flow as:

• As for me, summer mornings are especially pleasing

No. 特に is an adverb, and adverbs usually do not take particles in this kind of sentence.

So:

• 特に好きです = especially like

That is perfectly normal.

好き is usually treated as a na-adjective (or adjectival noun, depending on the grammar framework).

That is why it works like this:

• 好きです = is liked / is likable / like
• 好きな人 = a person I like / a favorite person
• 静かです and 好きです behave similarly in some ways

Because it is not a normal action verb, its grammar is different from English like.

です makes the sentence polite.

So:

• 好きです = polite
• 好きだ = plain
• 好き = casual, often used in conversation depending on context

The basic meaning does not change much; the main difference is politeness and style.

It can often be omitted if the context already makes it clear who is speaking.

Japanese frequently leaves out obvious subjects/topics.

So in many situations, you could simply say:

• 夏の朝が特に好きです。

That would still naturally mean I especially like summer mornings, if the speaker is talking about their own preferences.

私は is included when you want to:

• make the speaker explicit
• contrast with someone else
• give a more complete sentence

Yes, you can, but the nuance changes a little.

• 私は夏の朝が特に好きです
  = As for me, I especially like summer mornings.

• 夏の朝は特に好きです
  = As for summer mornings, I especially like them.
  This puts summer mornings in the topic position.

The second version can sound like you are contrasting summer mornings with other times, such as:

• 冬の朝は苦手ですが、夏の朝は特に好きです。
  = I'm not great with winter mornings, but I especially like summer mornings.

So both are grammatical, but the focus is slightly different.

Japanese often does not need a separate word like in when one noun modifies another with の.

English might express the idea as:

• morning in summer
• summer morning

Japanese simply says:

• 夏の朝

So the relationship is shown by の, not by a separate preposition.

It can be understood either way depending on context.

Japanese nouns usually do not change form for singular vs. plural. So 朝 can mean:

• a morning
• mornings

In this sentence, the natural English meaning is usually summer mornings in general.

A useful pattern is:

• A は B が 好きです

Meaning:

• As for A, B is liked
• Natural English: A likes B

In this sentence:

• A = 私
• B = 夏の朝

So:

• 私は夏の朝が特に好きです。

This is a very common pattern for talking about likes, dislikes, skill, and similar ideas in Japanese.