How do you decided when to use which as opposed to that?  It never felt too important to me to be able to make this distinction, but now, I do want to get this right.
1098
When is it appropriate to use that as opposed to which with relative clauses?
67745
She put forward two proposals, .......... of which didn’t make any sense to the participants in the summit.  The answer for this question in grammar exercises is ‘either’. I am doubtful whether to use either or neither. Can any one clarify this with reason.
17732
I never really gave a deep thought at this but recently a teacher of talked about language and there was an implicit question in it. something like  there is a difference between "rather than" and "instead of" in usage. do you know it??  please help and explain with a few examples.
37036
When should I use "as part of", and when "as a part of"?
33404
I still have problems to figure out when it's right to use I or me in an answer.  For example, what is the right answer to "Who did this?"  If I did it, should I say I or me? I've heard native speakers using both. Is there a rule?   And what are some examples when to use me, and when I?
32850
You would think we never use "skies" since there's only one sky, but I've heard it often enough that I often want to say "skies" rather than "sky". The problem is that I never gave much thought about it, so I have no idea why I even want to do that.  When do we say “skies” instead of “sky”?
111732
So, when I was a comparative novice to the novice I am right now, I used to think that these two things were syntactic sugar for each other, i.e. that using one over the other was simply a personal preference. Over time, I'm come to find that these two are not the same thing, even in a default implementation (see  and ). To further confuse the matter, each can be overridden/overloaded separately to have completely different meanings.   Is this a good thing, what are the differences, and when/why should you use one over the other?
84188
There are different types of problem.   or      There are different types of problems.   I easily get confused when I make such sentence(s). Look, still I am not sure whether I should use sentence or sentences.
14504
I know the "omitting-rules" regarding the relative pronouns who/which/that and whose. How does it work with where and when? In the first sentence I cannot omit where but I can easily omit when in the second sentence. What is the rule?   I saw John in the shop where you bought your brown T-shirt. I met Laura on the day (when) I missed the train to Barcelona.
49564
How does one decide whether to use who or that? In the title example:   The correct pronoun is who. The correct pronoun is that. Either is correct. They're interchangeable. It depends on the context.
50136
Which one should be used?      To me, it makes no difference, but I'm not really sure why.   vs     For me, it makes no difference, but I'm not really sure why.
10045
I don't know how to ask this more clearly than in the title.
82902
How does one correctly apply “in which”, “of which”, “at which”, “to which”, etc.?   I'm confused with which one to apply when constructing sentences around these.
89401
What's the correct form? If both are correct, what's the difference?
75300
I am very uncertain about when to use "most of whom," "most of who," or "most of which."  Please give concrete examples instead of only rules like, "this is the subject, so you should..."
6761
Sometimes I can't see which clause fits the best. What "check-up" could be done to make sure which one is the right one?  For example,  1) He will do anything that is needed. or He will do anything what is needed.  2) They always ignore that is so obvious. or They always ignore what is so obvious.  3) All that I have is yours. or All what I have is yours.  My take is the correct ones are 1) that 2) that 3) what/that???  But I am not sure. I think it has to do something with different types or dependent clauses, but I don't know how to go about them in this case. Any suggestions?  Here is an interesting example  How do I know what I think, until I see what I say? VERSUS How do I know that I think, until I see what I say?  I think both are correct meaning two different things.
73918
I can't distinguish the difference in meaning between these  two sentences.   It really doesn't matter.  It doesn't  really matter.    It seems that there is a nuanced difference, but I cannot see what this is.