tomodati no ie nara, enryosinaide koohii wo nomemasu.

It means something like if it’s a friend’s house or when it’s a friend’s house.

The key part is なら, which sets up a condition or topic:

• 友達の家 = a friend’s house
• なら = if it is / as for if it’s / when it comes to

So the speaker is saying that in the specific situation of being at a friend’s house, the rest of the sentence applies.

の links two nouns and often shows possession or connection.

So:

• 友達 = friend
• 家 = house/home
• 友達の家 = a friend’s house / the home of a friend

This is very common in Japanese. It works a lot like ’s or of in English.

Because なら is not marking location. It is presenting a condition or a context.

Compare these:

• 友達の家で = at a friend’s house
• 友達の家に = to a friend’s house / in a friend’s house, depending on the verb
• 友達の家なら = if it’s a friend’s house / when it’s a friend’s house

So なら adds the nuance of in that case or under that condition. The sentence is not just saying where the action happens; it is saying that being at a friend’s house changes what feels acceptable.

By itself, 友達 can mean friend or friends, depending on context.

In 友達の家, it is usually understood as a friend’s house, but Japanese does not force singular/plural the way English often does. If the context made it clear, it could also refer to friends’ house, though that is less likely here.

Literally, 遠慮する means something like to hold back, to be reserved, or to refrain out of politeness.

So:

• 遠慮する = to hesitate / to refrain / to be reserved
• 遠慮しないで = don’t hold back / without hesitating / without being reserved

In natural English, this often becomes feel free.

So in this sentence, it gives the idea of doing something without worrying that it might be rude.

Grammar-wise, 〜しないで can mean don’t do ~ or without doing ~, depending on context.

Here it is best understood as without hesitating or without holding back, not as a direct negative command.

So the structure is closer to:

• 遠慮しないで飲めます = can drink without hesitation

If someone said just 遠慮しないで！, that would sound like Don’t be shy! or Please don’t hold back!

It works adverbially: it describes how the drinking can be done.

So the sentence is basically:

• You/I can drink coffee without hesitation

In other words, 遠慮しないで modifies the action 飲めます.

This is a common pattern in Japanese:

• 心配しないで行けます = I can go without worrying
• 靴を脱がないで入れます = you can enter without taking off your shoes

飲めます is the polite form of the potential verb 飲める, from 飲む.

So:

• 飲む = to drink
• 飲める = can drink / be able to drink
• 飲めます = can drink (polite)

Here it expresses that drinking coffee is possible or acceptable in that situation. It is not only physical ability; it can also imply it’s okay to or I feel comfortable enough to.

Good question. With potential forms, both を and が can be found.

• コーヒーが飲めます often emphasizes coffee is something I can drink
• コーヒーを飲めます is also very common in modern Japanese and sounds natural

In this sentence, を is perfectly normal. It keeps the focus on the action of drinking coffee. You do not need to assume が is the only correct particle with potential forms.

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

Depending on context, it could mean:

• I can drink coffee without hesitation at a friend’s house
• You can drink coffee without hesitation at a friend’s house
• even one can drink coffee without hesitation at a friend’s house

Japanese often leaves out subjects when they are obvious from the situation.

Yes. The potential form in Japanese often overlaps with ideas like:

• ability
• possibility
• situational acceptability

So 飲めます here can feel like:

• can drink
• are able to drink
• it’s okay to drink
• can feel free to drink

Because of 遠慮しないで, the sentence strongly suggests social comfort rather than physical ability.

Yes, a little.

• 飲みます = drink / will drink
• 飲めます = can drink

If you said 友達の家なら、遠慮しないでコーヒーを飲みます, it would mean something more like When I’m at a friend’s house, I drink coffee without hesitation.

The original with 飲めます focuses more on what feels possible or acceptable in that setting.

The comma shows a pause and helps separate the condition/topic from the main statement.

So the sentence is mentally divided like this:

• 友達の家なら、 = if it’s a friend’s house / as for a friend’s house
• 遠慮しないでコーヒーを飲めます。 = I/you can drink coffee without hesitation

The comma is not always absolutely required, but it is very natural and makes the sentence easier to read.

It mainly says that they can do so comfortably. It does not necessarily mean they actually do it every time.

The point is the speaker’s attitude or the social situation: at a friend’s house, there is less need to be formal or reserved.

So the focus is more on comfort and lack of restraint than on the fact of drinking itself.