tā kěnéng yǐjīng huí jiā le.

In Mandarin, words like 可能 and 已经 usually come before the main verb, and their order matters.

• 可能 = possibly / may
• 已经 = already
• 回家 = go home / return home

A natural order is:

Subject + possibility/judgment + time/aspect marker + verb + 了

So:

他 可能 已经 回家 了
= He may possibly have already gone home

Why this order?

• 可能 comments on the whole statement: maybe
• 已经 tells you the action is already completed or the situation is already true
• 回家 is the action itself

If you say 他已经可能回家了, it sounds awkward because 已经 and 可能 are not normally ordered that way in this kind of sentence.

The 了 at the end does not simply mean past tense.

In this sentence, sentence-final 了 shows that a new situation has occurred or is now relevant:

• before: he was not home yet
• now: the situation may have changed, and he may already be home / may already have gone home

So 了 helps express that the state has been reached.

In 他可能已经回家了, the 了 makes the sentence sound complete and natural, especially with 已经.

They are related, but they are not the same thing.

• 已经 explicitly means already
• 了 marks a changed situation or completion/relevance

So together they often work as a pair:

• 已经 gives the meaning already
• 了 helps show that the action/state has been realized

This pairing is very common in Mandarin.

Compare:

• 他已经回家了 = very natural
• 他已经回家 = possible in limited contexts, but less complete-sounding
• 他回家了 = he went home / he has gone home
• 他已经回家了 = he has already gone home

In Mandarin, many verbs can take a place directly without a separate word like to.

So:

• 回家 = go home / return home
• literally: return home

You do not need a preposition equivalent to English to here.

Other similar examples:

• 去学校 = go to school
• 回北京 = return to Beijing
• 进房间 = enter the room

This is a very common difference from English.

Grammatically, it is made of:

• 回 = return / go back
• 家 = home

But in usage, 回家 functions very naturally as a single verb phrase meaning go home or return home.

So it is not one single character-word, but learners often treat it as a fixed chunk because it appears so often.

In writing, 他 usually means he / him.

But in spoken Mandarin, 他, 她, and 它 are all pronounced tā. So if you only hear the sentence, you may not know whether the speaker means:

• he
• she
• sometimes even it, depending on context

In modern written Mandarin:

• 他 = he
• 她 = she
• 它 = it

So in this written sentence, 他 specifically means he.

Literally, 回家 means go home / return home, so the action is going home.

But in real usage, 他可能已经回家了 can imply either:

1. He may already have gone home
2. He may already be home

Why? Because if someone has already gone home, the likely current result is that he is now at home.

So the sentence focuses on the completed action, but it often carries the result-state idea too.

Yes, often it can be omitted if the context is clear.

For example, in conversation:

• A: 他在哪儿？
• B: 可能已经回家了。

In B’s reply, there is no need to repeat 他, because everyone knows who is being discussed.

Mandarin often drops subjects when they are understood from context.

Yes, you can.

• 他可能回家了 = He may have gone home
• 他可能已经回家了 = He may already have gone home

The version with 已经 more clearly emphasizes already.

Without 已经, the sentence is still natural, but the sense of already is weaker and comes mostly from context and 了.

Here, 可能 is functioning like an adverb meaning possibly / maybe.

It expresses the speaker’s uncertainty or guess.

So:

• 他可能已经回家了 = the speaker is not fully sure; this is an inference or guess

Mandarin learners often see 可能 used in two common ways:

1. As an adverb:

   • 他可能不来了。
   • He may not be coming.

2. As a noun/adjective-like word meaning possibility / possible:

   • 有可能
   • there is a possibility

In your sentence, it is the first type.

The character 了 has more than one pronunciation and function.

In this sentence, it is the grammatical particle le, pronounced with a neutral tone.

This 了 is used to mark completion, change of state, or sentence-final aspect.

But 了 can also be pronounced liǎo in other words, where it has a different lexical meaning, such as:

• 了解 (liǎojiě) = understand
• 了不起 (liǎobuqǐ) = amazing

So in 他可能已经回家了, it is definitely the particle le.

Not exactly.

Mandarin does not map directly onto English tense. This sentence is better understood through aspect and current relevance, not just past time.

他可能已经回家了 suggests:

• the speaker thinks the action has probably already happened
• that completed action matters now

Good English translations include:

• He may have already gone home.
• Maybe he’s already gone home.
• He might already be home.

A plain past translation like He already went home misses some of the nuance.