Only the Volkswagen Polo, Golf, Passat, Passat CC and Sharan are available in this country.
This could be clearer. Although common sense says otherwise, this sounds like these are the only cars available in this country. You might instead use
The only Volkswagens available in this country are the Polo, Golf…
If the article is clearly just about VWs, though, you could probably omit Volkswagen from the first version and be just fine.
For the Subaru Legacy, all three options convey the same meaning.
Only the sedan version gets the 1.6-litre/124bhp and 1.8-litre/132bhp engines.
This means that the these engines come in the sedan version and are not available in the wagon, which may not be what you want.
The sedan version gets the 1.6-litre/124bhp and 1.8-litre/132bhp engines only.
This means that these are the only engines available in the sedan (presumably others and perhaps these are also available in the wagon).
The sedan version only gets the 1.6-litre/124bhp and 1.8-litre/132bhp engines.
This means something slightly different. Here only suggests that something is disappontingly lacking, like we might hope for better options, but these two engines is all we get. This use of only is similar to this
I wanted the 2010 Audi R8, but I could only afford the 1988 VW Rabbit.
Only in 1996, Ford sold a rebadged Mazda 626 GV over here as its rebranded Japanese mid-size stationwagon. (1996 was the only year)
Not exactly. More precise meaning would be Until 1996 Ford did not sell a...
In 1996, only Ford sold a rebadged Mazda 626 GV over here as its rebranded Japanese mid-size stationwagon. (Ford was the only manufacturer)
Correct.
In 1996, Ford sold only a rebadged Mazda 626 GV over here as its rebranded Japanese mid-size stationwagon (i.e. it was the only rebranded Japanese stationwagon from Ford)
No. The rebadged Mazda was all he ever sold that year (poor Mr.Ford...)
In 1996, Ford sold a rebadged Mazda 626 GV over here as its only rebranded Japanese mid-size stationwagon (there were no others, I assume?)
Here it's exactly what you said in your previous example. Mazda 626 GV was the only rebranded Japanese stationwagon from Ford
In 1996, Ford sold a rebadged Mazda 626 GV over here as its rebranded Japanese mid-size stationwagon only (but not as a hatchback or saloon)
Correct.
Just 3 weeks ago, there was a sudden snowfall (3 weeks ago recently?)
More or less.
3 weeks ago, there was just a sudden snowfall (no other natural disaster?)
Correct.
3 weeks ago, just there was a sudden snowfall (no other location)
Correct.
3 weeks ago, there was a just sudden snowfall (?)
The only meaning I can fathom for this usage is Suitable or proper in nature; fitting (and only after consulting the Free Dictionary, my first thought was just in the meaning of honorable/righteous).
Grammatically they all seem fine.
Best Answer
The sentence "Just the boy really feels something, the girl hates him." has two problems.
The first, as Barrie says, is the comma splice between two independent clauses.
The second is the contradiction. Both the girl and the boy feel something. Presumably, however, the boy loves the girl but the girl hates the boy. Hate is a feeling.
Neither only nor just is appropriate here.