, in which vs in which,

Both ", in which" and "in which," are correct, but they are used in different contexts. The version with the comma (", in which") is used when introducing a non-restrictive relative clause, providing additional information that is not essential to the meaning of the sentence. On the other hand, "in which," is used without a comma when introducing a restrictive relative clause, which is necessary to identify the noun being referred to.

Last updated: March 24, 2024 • 992 views

This construction is correct and commonly used when introducing a non-restrictive relative clause.

", in which"

Use ", in which" when introducing a non-restrictive relative clause that provides additional, non-essential information.

Examples:

The book, in which the main character is a detective, is very popular.
The event, in which many people participated, was a great success.

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A dark ceremony, in which a human host is bonded with demonic shadows.
These are priority areas, in which remaining shortcomings must be adequately addressed as soon as possible.
Unless you subscribed to this magazine, in which case it was blast from a UFO.
Unless of course you're hungry, in which case I'm starving.
Operation Infinite Wisdom, in which the gods cease to be benevolent, in which the full bicep of the American military machine flexes its... bicep.
In six months she could be a completely different kid, in which case this meeting becomes totally irrelevant.
Other Member States can present objections, in which case the Commission will intervene in the procedure.
Unless you meant Joyce, in which case, I agree.
That means Semak doesn't trust you, in which case you're no use to me.
It says the head of the city council will automatically succeed the mayor unless challenged by another candidate, in which case a special election must be held.
It's a game that I just invented, in which the participants answer physics questions in remedial Spanish.
Well, it does unless you have a tumor in your frontal lobe, in which case, primitive reflexes come back along with disinhibition.
Not if she crosses state lines to see her kid, in which case, we'll take the collar.
In a static world in which all economic indicators remained unchanged year after year, in which capital was not accumulated, in which no one was born and no one died, they would be.
Either there is something wrong with the foods in question, in which case they should be banned, or they are safe, in which case no special rules are required.
Now to accomplish that the Academy follows a military system, in which discipline is cornerstone.
Shortly after Armstrong retired, there was this huge bust called Operation Puerto, in which most of his rivals got popped.
After 37 minutes, in which you allowed your team to put lives at risk.
The Administrative Departments of Contracting Parties, in which the approval was granted, may undertake the same tests.
The legal context, in which the management and regulation of the AbstractMonitoringObject is defined.

Alternatives:

The book, where the main character is a detective, is very popular.
The event, with many people participating, was a great success.

This construction is correct and commonly used when introducing a restrictive relative clause.

"in which,"

Use "in which," when introducing a restrictive relative clause that is essential to identify the noun being referred to.

Examples:

The room in which the treasure was hidden was finally discovered.
The folder in which the documents are stored is on the shelf.

Show examples from the web [+]

There are numerous cases in which, for objective reasons, the European Commission may be late submitting a study.
I still regret the way in which, last time, Mrs Gillig and her Socialist colleagues refused even to bring this point to a vote in a democratic manner.
Any reproduction activity of text and/or images in which, with the use of an image carrier, ink is transferred onto whatever type of surface.
It therefore seems to me that this is truly a sector in which, in terms of forming the economic and social fabric of Afghanistan, we can and must invest.
Even childhood innocence is tainted and drawn from a horrible crime to a lesser one in which, through its own ingenuity, it believes to find freedom from guilt.
It is an area of considerable geological interest in which, thanks to intensive tectonic activity, a remarkable range of materials and formations flourish.
Mr. Skelos received your request, Detective Agnew, in the spirit in which, I'm sure, it was intended.
The capping of direct payments is a new form of discrimination against Member States in which, for historical reasons, most of the agricultural undertakings manage larger areas of land.
We find ourselves living through peculiar circumstances in which, unfortunately, the financial crisis is now also affecting the real economy.
We believe that a system involving planned care in which, following a medical examination, prior notification could quickly be obtained would be to patients' advantage.
A situation in which, on our very doorstep - in Belarus, manifestations of democracy in both political and NGO respects are brutally suppressed is unacceptable.
A new wave of openness and democratization in which, since 2000, more than two-thirds of African countries have had multi-party democratic elections.
I am extremely grateful to Mr Wuermeling for the way in which, in Amendments Nos 4 and 62, he has sought to create an exemption for that kind of activity.
By opening up national contact points, cross-border access to healthcare will no longer be a leap of faith in which, to date, patients already debilitated by disease have unfortunately all too often had to deal with bureaucratic, linguistic and financial problems.
There was a time in which, I don't know, people who were black couldn't have the same rights.
Mr President, I wish to congratulate the rapporteur for her great commitment in dealing with this report on a programme of Community action for combating social exclusion in which, as many have said, poverty can be an important factor.
I therefore request an answer so that this saga can stop in which, more importantly, the European Union appears to assent to this sort of...
Furthermore a procedure is needed to deal with cases in which, despite all reasonable efforts, no response is obtained from the importing country, so that exports of certain chemicals may proceed on a temporary basis under specified conditions.
There may be circumstances in which, given adequate justification, other control substances, meeting the above criteria, may be used.
In rooms in which, as a general rule, they cannot be seen by crew members, on-board personnel or passengers, the possibility of triggering an alarm should therefore be provided for.

Alternatives:

The room where the treasure was hidden was finally discovered.
The folder where the documents are stored is on the shelf.

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, in which vs in which,

", in which"

"in which,"

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