I will call him for advice what models of the appliances are cheaper, more convenient and reliable.

  1. Is the word "models" appropriate here, or do I need to choose some other word?

  2. Is "reliable" an absolute adjective here, or a comparative adjective? In other words, is "more" valid after "and"?

  • 1
    Yes, models is appropriate, but if it's clear from the context which appliances you are talking about, it would be more natural just to say what/which models are cheaper. You can say that one is more reliable than others. Jan 3 at 12:52
  • 1
    I would add ‘on’ after ‘advice’, although I don’t think it’s necessary.
    – Alon
    Jan 3 at 13:03
  • @Kate Bunting, If there are four different types of appliances in that context, I guess that "what models of the appliances" is better appropriate here than simply "what models". Right? Is "more convenient and reliable" = "more convenient, more reliable"? Right? Thank you in advance.
    – Sergei
    Jan 3 at 14:49
  • @Alon, Could you explain please why you think it's better to add "on"? What's the rule?
    – Sergei
    Jan 3 at 14:54

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