He did not realise vs He did not realised

Some examples from the web:

• Maybe he did not realise how different it was. But he became interested in constructing meanings.
• He did not realise it...
• He may not realise something is wrong.
• They did not realise that there were insufficient funds to cover policyholders with GARs.
• Morwenna does not realise how lucky she is.
• You do not realise how much stuff needs electricity.
• Monsieur could not realise how the mind accommodates itself to such things when it is necessary.
• Because we do not realise that these commands are for our good we needlessly suffer.
• Final users may not realise our contribution to the ensuing product properties.
• You may not realise it, but you have.
• We do not realise just how obscure the mechanisms are.
• He does not realise that only the bourgeoisie can make a bourgeois revolution.
• You may not realise it since they are available all year.
• We did not realise such quality existed.
• I was fearful because I did not realise what was happening.
• She does not realise how vulnerable you are.
• Many cities often do not realise that they can prevent problems concerning transport organisation through thorough planning of local road infrastructure.
• The problem arises when directors do not realise that their business is at risk.
• Most do not realise that the European mainland coast stretches for almost 90000 km.
• I did not realise he was a close friend.

Some examples from the web:

• I'd not realised how close.
• This is not realised if you only take a blinkered view of the matter.
• Many of those expectations were not realised.
• In practice, a total conversion of all ODM is not realised.
• Ambition is not realised through communiqués and great and grand statements.
• In consequence, the benefit of investment in new machinery was to some extent not realised.
• Unfortunately, expectations were not realised and the disappointment was directly proportional to this.
• I had not realised until Dudley told me how my departure to France left you vulnerable, unprotected.
• Until a few years ago it was not realised that stem cells occur in almost all organs of the human body (including the brain).
• The Commission considers this proposal to be a clear indication that indeed the securitisation in question was not realised.
• Disaster. I'd not realised that the amp would not cope with a low output moving coil.
• I had not realised this, but you will be able to check it with the tape.
• The central role played by research was acknowledged in this desire was not realised, for a number of reasons.
• Joshua must've gotten an old directory and not realised it's no good.
• Men and women have equal rights under law. As in western countries, this formal equality is not realised in all areas.
• Utilization some of them in the described studies was not realised yet, but they will really be used and useful.
• All of these factors have meant that the full extent of the air quality problem was not realised until after 1998.
• The US and China have still not realised this fact, but the European Union clearly understands that the future belongs to whoever now leads the way in green economic development.
• Forgive me. I had not realised that flirting was a prerequisite for being Prime Minister.
• The objectives of the MEDA programme were unfortunately not realised in the financial period that has just ended.