John opened only three of the boxes. ? a. the boxes only three of which John opened. ? b. the boxes of which John opened only three. ? c. the boxes John opened only three of. ? d. the boxes John opened only three of which ***********************
All these sound OK to the native ears?
Top answer
pructus All these sound OK to the native ears? Not d. That's bizarre!
— CalifJim
pructus All these sound OK to the native ears?
Not d.
That's bizarre!
c.
is a bit difficult to follow, too, so that's "borderline", but I'd definitely accept a.
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I concur with CJ, only a and b sound right to me. I find that c is a poorly constructed version of your example sentence "John opened only three of the boxes" so there's no need to reorder it and make it questionable. Option d does not work at all.