And, how about the samples below. Do they sound ok to native speakers?
"We were recommended wait more."
"We were recommended to wait more."
"We were recommended (that) we should wait more."

Other
Hi,
Could anyone possibly tell me what happens to the subjunctive verbs in a passive voice?
A. Police demanded that the neighbours (should) stay in.
B. The neighbours were demanded TO stay in. (???)
Should this "TO" be omitted? Thanks in advance
And, how about the samples below. Do they sound ok to native speakers?
"We were recommended wait more."
"We were recommended to wait more."
"We were recommended (that) we should wait more."
These would be my preference:
A. Police demanded that the neighbours stay in.
B. The neighbours were ordered to stay in. (not "demanded")
Note that "neighbour" is British spelling; in America, it would be "neighbor".
As for second group:
"We were recommended wait more." No.
"We were advised to wait longer." Not "recommended", and "longer" is preferable to "more".
"We were advised that we should wait longer."
Not necessarily. You could perfectly well say, e.g.
It was vital that the problem be solved quickly.
containing passive subjunctive VP 'be solved'.
However, where the original construction does not (naturally) either permit or require a subjunctive form, but rather an infinitive (order smb. to do smth., etc.), then we naturally would not attempt to use a subjunctive in the corresponding passive!
Just ensure that you do not inadvertently mix constructions in the process of making the active-to-passive conversion. The correctly formed (if somewhat unidiomatic) passive corresponding to your original sentence
Police demanded that the neighbours stay in.
would be
It was demanded (by the police) that the neighbours stay in.
Note that the subjunctive verb in the subordinate clause in such cases is entirely unaffected by the transformation, which concerns only the main clause.
I'll try to explain it to you. If neighbours could be demanded, it would mean that someone could demand neighbours. And one can't demand neighbours, one can demand something from neighbours.
It can be confusing, because of this way of thinking: 'demand' ~ 'ask', so 'demanded' ~ 'asked'. But these two words are used differently:
He asked me for some money.
So,
I was asked for some money.
But:
He demanded some money from me.
Now, you can't say:
I was demanded some money.
This is the money that was demanded, not you.
You can say:
Some money was demanded from me.
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