Reply to "-ing form with preparatory it"

Hi, Hussein,

This is indeed a very interesting topic.

To put it briefly, the possibility (or impossibility) to use a gerund in extraposition (anticipated by "it") has to do with the type of adjective, as you can see in this old thread.

While "advisable" belongs to the group of more objective adjectives that don't allow for the use of an extraposed gerund (necessary, urgent, vital, important, essential), "amazing" and "interesting" are more subjective in nature, being similar to pleasant, nice, strange, tough, difficult, and thus allow for a gerund after them.

Needless to say, more "emotional" adjectives accept the informality you mention of placing the gerund in extraposition, while more "rational" ones preclude that possibility as they tend to be more formal.

 

Last edited by Gustavo, Contributor
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