Question to Mr. Purewal regarding the usage of in which

[RichaChampion]

Mr. Purewal You have said this on some different thread located here, but that thread is now closed.

"In which" is, of course, totally different. It doesn't have anything to do with purpose; it just refers to some situation in which something goes/happens in something else.
The teacher drew a diagram in which a circle was enclosed in a square.

Can we also safely conclude that after "in which" we will always have a clause, which means a Subject-Verb pair.

[RonPurewal]

after "in which" you need a whole sentence, yeah.

[RichaChampion]

after "in which" you need a whole sentence, yeah.

Thanks Sir,

I can now connect to some other thread also where you have mentioned this -

all constructions built on preposition + "which" - such as of which, from which, some of which, with which, etc. - must be used in the same way as "which" itself. [Citation].

Now "in" is also a preposition , therefore, in + which will also behave just like which based on the above theory.

[RonPurewal]

...although "in which..." could either follow a comma or not (as opposed to "which...", which should always come after a comma).

in terms of what you're asking here, though -- the stuff *after* "which"/"in which"/etc. -- yeah, that should be a complete sentence.