Post #10 approves of the following active/passive pair:
Originally Posted by Takahero
active: Mary saw John draw a circle.Your question is: Would the following corresponding pair with an expletive 'it' also be approved of?
passive: John was seen to draw a circle.
active: I saw it rain.Noticing that Google suggests it can't, and that Google Books contains only one instance of the construction (which is from the contents of an book named Orosius, translated from Anglo-Saxon (Old English) in 1853:
passive: It was seen to rain.
How it was seen to rain milk from heaven, and blood to bubble from the earth (Oros. iv. 5),)I too would be interested in knowing the answer.