Because we don't know what happened between the two years, I shouldn't use words like "removed", or "demolished"? There might be a fire and the glasshouse might be destroyed by the fire.
I shouldn't use "changed", "converted", or "turned" either because the glasshouse and seats, and the water feature are completely different things.
The only word I can use is "replaced". Is this correct?
To the right of the garden, the glasshouse and seats have been replaced by a water feature. (correct)
To the right of the garden, the glasshouse and seats have been removed/demolished to make room for a water feature. (Incorrect)
To the right of the garden, the glasshouse and seats have been changed/turned/converted into a water feature. (Incorrect)
However, the stage for musicians and the amphitheater for concerts, in essence, are the same things. So I can use "changed", "turned", "converted" or "transformed"?
The stage for musicians on the left side of the park has been changed/turned/converted/transformed into an amphitheater for concerts.
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