I think Up to the present time (although throughout the eighteenth and nineteenth centuries confuses the matter a bit) forces has been placing (present perfect) in the main sentence. However, in the subordinate (after but ), I think we should use tense simplification and use the simple past concentrated
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MapleSo it should be:
Up to the present time, throughout the eighteenth and nineteenth centuries, this new tendency has been placing the home in the immediate suburbs, but concentrated manufacturing activity, business relations, government, and pleasure in the centres of the cities.
But is the subordinate consistent with the mai