Hello native English speakers. Thank you very much in advance. Three big questions defeat me very much though relating to many sentences, which are:

1a. Wherever known, such facts have been reported.
1b. Wherever they are known, such facts have been reported.
1c. Wherever such facts are known, they have been reported.
Which is grammatically correct?
Do they have the same meaning?

2a. Where having nothing, nothing can you lose.
2b. Where you have nothing, you can lose nothing.
2c. Where having nothing, nothing can be lost.
Question:
Which is grammatically correct?
Do they have the same meaning?

3. You must not use my pen unless writing a letter.
4. If in need, don't hesitate to ask me for money.
5. Though agreeing with you up to a point, I can not agree to your plans as a whole.
6. Even though given every attention, the crops wouldn't grow well.
7. It is one of the finest poems produced in recent years, if not the finest.
8. Our remaining horse was utterly useless as wanting an eye.
Question (from 3 to 8):
Which is grammatically correct?

Question

Hello native English speakers. Thank you very much  in advance. Three big questions defeat me very much though relating to many sentences, which are:

1a.  Wherever known,  such facts have been reported.
1b. Wherever they are known,  such facts have been reported.
1c. Wherever such facts  are known,  they have been reported.
Which is grammatically correct?
Do they have the same meaning?

2a.  Where having nothing, nothing can  you lose.
2b. Where you have nothing, you can lose nothing.
2c. Where having nothing, nothing can  be lost.
Question: 
Which is grammatically correct?
Do they have the same meaning?

3.  You must not use my pen unless writing a letter. 
4.   If in need, don't hesitate to ask me for money.
5.  Though agreeing with you up to a point, I can not agree to your plans as a whole.
6.  Even though given every attention, the crops wouldn't grow well.
7.  It is one of the finest poems produced in recent years, if not the finest.
8.  Our remaining horse was utterly useless as wanting an eye.
Question (from 3 to 8):
Which is grammatically correct?

Answer

#1
These are all good sentences but I cannot imagine why you would say any of them.  Why would known facts be reported if they are known?  I'm not sure what the intended meaning is.  Perhaps something like this:
"Wherever they become known, such facts have been much discussed"

#2
All can be understood, but are not strong sentences.
"Having nothing, you can lose nothing"  (good because it puts the adjective phrase "having nothing" next to the pronoun it modifies ("you")
2b is ok, but use "when", not "where"

#3 is weak because it is not clear enough what the adjective phrase "writing a letter" modifies.  Better:
"Writing a letter, you must not use my pen"
or
"You must not use my pen unless you are writing a letter"

#4 ok
#5 ok, but I would say "though I agree" rather than "though agreeing"
#6 I don't really like "every attention".  I prefer "loving care", "devoted attention", "steady tending"
#7 ok, but I don't think of "poems" as being "produced".  For something artistic, I prefer "written", "composed", or "created".  I would use "produced" more for commercial things, but it's not wrong.
#8 This is not good use of "as".  The role of "wanting an eye" is not at all clear.  I cannot even tell if it is a noun or an adjective phrase:
"Wanting an eye, our remaining horse was utterly useless"
(Always try to put a phrase next to the thing it modifies - in this case it modifies "horse")

Answer

2: when you have nothing, you have nothing to lose
"when" is used to refer to it being a time or event, rather than a place 😊