[Grammar] Inversion - in any circumstances

[barnej0096]

'He would go on working in any circumstances.' Do I need inversion here?
Which version is correct:
'In no circumstances would he go on working' or 'In no circumstances he would go on working.'

 

[bhaisahab]

'He would go on working in any circumstances.' Do I need inversion here?
Which version is correct:
'In no circumstances would he go on working' or 'In no circumstances he would go on working.'

They mean the opposite of the original sentence.