んですがleading into a request or question
You explain your situation with んです, and が hands over to what you want to ask. No "but" is meant. It is the everyday polite way to open a request or a question.
a request
I'm lost. Could you tell me how to get to the station?
a question
I sent an email a little while ago. Has it arrived?
the rest unsaid
Excuse me, I'd like to make a reservation…
How to form it
Plain form + んですが
行くんですが, 行きたいんですが, 分からないんですが, 送ったんですが, 痛いんですが.
Noun or な-adjective
〜 + な + んですが
二人なんですが, 初めてなんですが.
Other shapes
んですけど / のですが / んだけど
んですけど is the same thing, a little more relaxed. のですが is for careful speech and email. んだけど is for friends.
Your situation first, then what you want
A request out of nowhere is abrupt. This way the other person knows why you are asking before you ask. English uses two sentences, or "so".
The copier isn't working. Could you take a look at it?
This is my first time doing this job. Where should I start?
I'm going to Kyoto next week. Could you recommend a temple?
I've lost my room key. What should I do?
With けど, at a hotel desk.
A noun with なんですが can also raise a subject: "about…".
About tomorrow's reservation: could I change the time?
Stopping at が
When it is plain what you want, you can stop there. Nothing is missing: the other person takes it from you.
Excuse me. There are two of us…
Certainly. I'll check for a table now.
At the door of a restaurant. A wants a table and doesn't need to say so.
It is also a soft way to say no: you give your situation and leave the refusal unsaid.
to an invitation
I have other plans that day, I'm afraid…
Things you'll say
ちょっと聞きたいんですがMay I ask you something?
Excuse me, may I ask you something? Does this train go to the airport?
お願いがあるんですがI have a favor to ask.
I have a favor to ask. Is now a good time?
〜たいんですがI'd like to…
I'd like to send this parcel…
〜を探しているんですがI'm looking for…
I'm looking for a black bag. Do you have any?
Not から
English "so" makes から tempting. Then your situation becomes the reason the other person has to help. To a friend that is fine. To a stranger it is pushy; the "because" for a stranger is the softer ので.
Sounds odd: 道に
I'm lost, so tell me how to get to the station.
To a stranger: 道に迷ったんですが、….
With friends: んだけど
Can I ask you something? How do you read this kanji?
Close neighbours
が・けどN5
The same が. When the second half goes against the first, it is a real "but".
This restaurant is cheap, but the food isn't very good.
"Could you please…?" The careful request that often comes after it.
Excuse me, could you take a photo?
Check yourself
1You and two friends walk into a restaurant. What do you say to the staff?
Choose an answer to see why.
2You stop a stranger in the street. Which is the polite way to ask?
Choose an answer to see why.
More sentences
I have a headache. Do you have any medicine?
My Japanese still isn't good. Is that all right?
careful, or in an email
I have one question. Would that be all right?