1. ഞാൻ നിങ്ങളെ അറിയിച്ചിരുന്നു (njan ningale ariyichairunnu) - This is a direct translation and means "I would have informed you".
2. ഞാൻ നിങ്ങളോട് പറഞ്ഞിരുന്നു (njan ningalod paranjairunnu) - This means "I would have told you". It's a more literal translation of the English phrase.
3. എനിക്ക് നിങ്ങളെ അറിയിക്കാമായിരുന്നു (enikku ningale ariyikkaamaayirunnu) - This means "I could have informed you", which is a more indirect way of saying "I would have told you".
4. നിങ്ങളെ അറിയിക്കാൻ എനിക്ക് സാധിച്ചിരുന്നു (ningale ariyikkaa enikku saadhichirunnu) - This means "I was able to inform you", implying that you could have been told, but you weren't.
The best translation will depend on the context of the sentence and the specific meaning you want to convey.