Let's first have a look at the structure of the Conditional Passive in terms of the various grammatical moods (indicative, interrogative, imperative) and in terms of polarity (positive and negative).
|indicative||You would be accepted|
|indicative contracted||They'd be preferred|
|interrogative||Would we be invited?|
|indicative||They would not be considered|
|indicative contracted (1)||We'd not be sent|
|indicative contracted (2)||It wouldn't be allowed|
|interrogative||Would they be produced?|