Could you please tell me the difference between "has" vs "has been". For example: 1) the idea has deleted vs.: 2) the idea has been deleted What is the difference between these two? There has been some rapid progress. This is correct, because "progress" is an uncountable noun (ie. nouns that we can't count, so don't have different plural forms); therefore, it can only take a singular.

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Jamie Morant Danielle Aykroyd