Can the structure “sb doing” replace a clause? It is grammatically correct to change this to

I suggest that your question is not correct, once again the question is about grammar whilst disregarding meaning or use. "Such" is a word used to emphasis things. So what is the important thing in this sentence? The Blessing or that he has come home safe? I would suggest that the original sentence emphasis both whilst the second does not and also alters the meaning. Lets show this by substituting the meaning of Blessing for it's meaning (something that is extremely lucky or makes you happy) in the sentences

It is such luck/happiness for him to come back safe He is very lucky/happy to have been able to come back

Him coming back safe is such luck/happy His coming back brings a lot of luck/happiness because he is back

So the "whether the grammar may be correct" or not is in my opinion a little irrelevant. The use and therefore meaning should be the more important factor.

Blessing noun (LUCKY SITUATION) Cambridge English dictionary something that is extremely lucky or makes you happy:

P.S. I would also suggest that the use of blessing is wrong in both sentences as I believe that it is trying to imply that the mothers prayers have been answered rather than the luck involved with her son's return.

Can the structure “sb doing” replace a clause? It is grammatically correct to change this to

I suggest that your question is not correct, once again the question is about grammar whilst disregarding meaning or use. "Such" is a word used to emphasis things. So what is the important thing in this sentence? The Blessing or that he has come home safe? I would suggest that the original sentence emphasis both whilst the second does not and also alters the meaning. Lets show this by substituting the meaning of Blessing for it's meaning (something that is extremely lucky or makes you happy) in the sentences

It is such luck/happiness for him to come back safe He is very lucky/happy to have been able to come back

Him coming back safe is such luck/happy His coming back brings a lot of luck/happiness because he is back

So the "whether the grammar may be correct" or not is in my opinion a little irrelevant. The use and therefore meaning should be the more important factor.

Blessing noun (LUCKY SITUATION) Cambridge English dictionary something that is extremely lucky or makes you happy:

P.S. I would also suggest that the use of blessing is wrong in both sentences as I believe that it is trying to imply that the mothers prayers have been answered rather than the luck involved with her son's return.

The Question examples have Changed.

Q. Can the structure “sb doing” replace a clause? It is grammatically correct to change this to

I suggest that your question is not correct, once again the question is about grammar whilst disregarding meaning or use. "unacceptable" is a word used to describe something that is not acceptable. So what is the important thing in this sentence? The acceptability of the action or what has/is actually happened/happening? I would suggest that the original sentence and the alternative are not describing what events are taking place.

A swimming pool has a leak, the sauce bottle is leaking. The "White House" has a leak. The water, ketchup, information comes out.

So the "whether the grammar may be correct" or not is in my opinion a little irrelevant. The use and therefore meaning should be the more important factor.

Can the structure “sb doing” replace a clause? It is grammatically correct to change this to

I suggest that your question is not correct, once again the question is about grammar whilst disregarding meaning or use. "Such" is a word used to emphasis things. So what is the important thing in this sentence? The Blessing or that he has come home safe? I would suggest that the original sentence emphasis both whilst the second does not and also alters the meaning. Lets show this by substituting the meaning of Blessing for it's meaning (something that is extremely lucky or makes you happy) in the sentences

It is such luck/happiness for him to come back safe He is very lucky/happy to have been able to come back

Him coming back safe is such luck/happy His coming back brings a lot of luck/happiness because he is back

So the whether the grammar may be correct or not is in my opinion a little irrelevant. The use and therefore meaning should be the more important factor.

blessing noun (LUCKY SITUATION) Cambridge English dictionary something that is extremely lucky or makes you happy:

P.S. I would also suggest that the use of blessing is wrong in both sentences as I believe that it is trying to imply that the mothers prayers have been answered rather than the luck involved with her sons return.

Can the structure “sb doing” replace a clause? It is grammatically correct to change this to

I suggest that your question is not correct, once again the question is about grammar whilst disregarding meaning or use. "Such" is a word used to emphasis things. So what is the important thing in this sentence? The Blessing or that he has come home safe? I would suggest that the original sentence emphasis both whilst the second does not and also alters the meaning. Lets show this by substituting the meaning of Blessing for it's meaning (something that is extremely lucky or makes you happy) in the sentences

It is such luck/happiness for him to come back safe He is very lucky/happy to have been able to come back

Him coming back safe is such luck/happy His coming back brings a lot of luck/happiness because he is back

So the "whether the grammar may be correct" or not is in my opinion a little irrelevant. The use and therefore meaning should be the more important factor.

Blessing noun (LUCKY SITUATION) Cambridge English dictionary something that is extremely lucky or makes you happy:

P.S. I would also suggest that the use of blessing is wrong in both sentences as I believe that it is trying to imply that the mothers prayers have been answered rather than the luck involved with her son's return.