watasi ha sore ga suki desu.

In 私はそれが好きです。 (Watashi wa sore ga suki desu.), the particles have different jobs:

• は (wa) marks the topic: what we’re talking about.
• が (ga) marks the subject of the adjective 好き.

So the structure is:

• 私 は – as for me / speaking about me
• それ が – that thing is (the thing that has the property)
• 好き です – is liked

Literally: “As for me, that is liked.”

Natural English: “I like that.”

Using both is very common in Japanese when you:

• first set up who or what we’re talking about with は, then
• show what has the property (好き, きれい, 便利, etc.) with が.

Yes, and it’s very natural.

• それが好きです。 – I like that.

Japanese often omits things that are obvious from context. If it’s clear you’re talking about your likes, 私 is unnecessary.

私はそれが好きです sounds a bit more explicit/emphatic about “me”:

• 私はそれが好きです。 – As for me, I like that (maybe unlike others).
• それが好きです。 – I like that. (neutral, default)

Because 好き is not a verb like “to like” in English. It’s a na-adjective / adjectival noun meaning “liked, pleasing, favorite”.

The grammar pattern is:

• X が 好きです。 – X is liked / X is pleasing (to me).

So we mark the thing that is liked with が, not を.

✕ それを好きです is ungrammatical.
Use:

• それが好きです。 – I like that.
• 猫が好きです。 – I like cats.

Think of it like a description, not an action.

• 好き (すき) is like “liked / favorite / pleasing”.
• です is the polite “to be” (copula).

So:

• それが好きです。 → That is liked / That is pleasing (to me).

The “to me” part is usually understood, not said. In English we say “I like that,” but in Japanese it’s more like:

• That is a liked thing (for me).

Yes.

• 好きです – polite/formal
• 好きだ – plain/informal

So:

• 私はそれが好きです。 – polite; good for talking to strangers, teachers, coworkers, etc.
• 私はそれが好きだ。 – casual; used with friends, family, or people below you in hierarchy.

The meaning (liking something) is the same; only the politeness level changes.

In everyday conversation, それが好きです is usually more natural because Japanese likes to drop obvious subjects.

Use 私はそれが好きです when:

• you’re contrasting yourself with others:
  
  • みんなは辛い料理が好きじゃないですが、私はそれが好きです。
    Everyone doesn’t like spicy food, but I like it.
• you want to clearly emphasize “me” as the topic.

Otherwise, just それが好きです is perfectly fine.

Subtle nuance difference:

1. それが好きです。

   • が focuses on what satisfies the adjective 好き.
   • Neutral statement: That is (the thing I) like.
   • Often used when choosing/identifying:
     • どれが好きですか。 – Which one do you like?
       それが好きです。 – I like that one.

2. それは好きです。

   • は sets “that” as the topic/contrast.
   • Often implies contrast:
     • As for that, I like it (but maybe not something else).
   • Example:
     • 映画は好きですが、ゲームはあまり好きじゃないです。
       As for movies, I like them, but games I don’t like so much.

In many casual contexts they both translate as “I like that,” but が is more “this is the one I like,” while は often carries a “as for that…” or contrastive feel.

Yes, 私はそれが大好きです。 is correct.

• 好き – like
• 大好き (だいすき) – really like / love (in a strong sense)

Examples:

• 私はそれが好きです。 – I like that.
• 私はそれが大好きです。 – I really like that / I love that.

大好き is still an adjective-like word (same pattern: X が大好き).

You just negate 好き:

• 私はそれが好きじゃないです。
  I don’t like that. (polite, slightly casual)

  More formally:

• 私はそれが好きではありません。

Casual:

• それが好きじゃない。
• それは好きじゃない。

Same pattern, just making 好き negative.

The natural order for this sentence is:

• [Topic] は [liked thing] が 好きです。

So:

• 私はそれが好きです。
• 私は寿司が好きです。 – I like sushi.
• 兄は音楽が好きです。 – My older brother likes music.

You can sometimes rearrange within a larger sentence, but は and が almost always stick to the words they mark, and 好きです stays at the end. You can’t do things like:

• ✕ 好きです私はそれが。

Japanese word order is relatively flexible, but predicates (like 好きです) naturally go at the end.

You’d usually say:

• あなたが好きです。 – Literally You are liked (by me).
  Natural English: I like you.

Often あなた is omitted:

• 好きです。 (context: confessing) – I like you.

Be careful: あなたが好きです in a romantic context is often romantic liking, not just “you’re a nice person.” Context and tone matter a lot.

Yes, if the thing you like is obvious from context.

Example:

• Someone shows you a shirt and asks:
  これ、どうですか。 – How about this?
  You: 好きです。 – I like it.

In conversation, you often only say 好きです / 好きだ / 好き when both the subject (“I”) and the object (“that/it”) are clear from context.