He probably did/He may well have don

[AlexAD]

Hello.

I am working on my spoken English and as I was listening to the audio lesson I heard this,
'Did he eat candy? Yes, he probably ate candy.' and I then the construction of 'may well' meaning 'probably' came to my mind and I applied it in this context. So I got,
'Did he eat candy? Yes, he may well have eaten candy.'

Is that correct? Does that sound natural?
Is that standard English or is that BrE?
Being non-native speaker, should I avoid this construction or use it?

Thanks, Alex.

[5jj]

'Did he eat candy? Yes, he may as well have eaten candy.'

'May' well' and 'may as well' mean different things. You want 'may well' here.

[AlexAD]

'Did he eat candy? Yes, he may as well have eaten candy.'
'May' well' and 'may as well' mean different things. You want 'may well' here.

Sorry, corrected.