Hi The Wrights sentence you cannot reduce because of confusion between the garden and the Wrights. ' The word 'which' in the original sentence helps to make it clear that the relative clause refers to one thing (the garden) not several (the Wrights) - if you take it out, it's ambiguous. a) is gramatically ok but with such a short sentence putting that word after the subject looks a bit odd - I'd expect it for a name, like 'The girl, Maria, is my sister' but 'The tall girl is my sister' or if you're essentially interrupting yourself with more information, maybe 'The girl - the tall one - is my sister'.
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Anonymousit is not possible to reduce relative clauses all the time, ... as an example:
-"The Wrights spend a lot of time in their garden, which runs right down a river".
It says we cannot reduce "which runs" to "running" in that sentence.That's true. When you have a sentence with "spend time", you add an -ing expression to indicate what was done during
AnonymousIs it possible to make reduction in the following relative clauses. If no, why not???Once you reduce a clause to a single adjective, you almost always have to move it so it's before the noun.
a) The girl, who is tall, is my sister- The girl, tall, is my sister??