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Dear teachers,
Are these sentences the same in meaning ?:

Until now, the people cannot these poetical artifacts
Tthe people cannot these poetical artifacts until now
It is not until now that the people can see these poetical artifacts
Not until now can the people seethese poetical artifacts

He did not really devote himself to painting old pagodas until 1981
Until 1981, he did not really devote himself to painting old pagodas
It was not until 1981 that he really devoted himself to painting old pagodas
Not until 1981did he really devote himself to painting old pagodas

The secret was never told until the man'death
Until the man'death, the secret was never told
It was not until the man'death that the secret was ever told
It was never until the man'death that the secret was told
Never until the man's death was the secret told

Thank you in advance
Comments  
The first set is very difficult to understand. The first 2 sentences do not have a verb. In the next two "can see" is not correct with "until now". A good sentence would be:

The people could not see the fruits of their labor until now.
TuongvanUntil now, the people cannot these poetical artifacts
Tthe people cannot these poetical artifacts until now
It is not until now that the people can see these poetical artifacts
Not until now can the people seethese poetical artifacts
The second set is better, but some of the positionings of the adverb phrase do not sound as natural as others.

TuongvanHe did not really devote himself to painting old pagodas until 1981
Until 1981, he did not really devote himself to painting old pagodas
It was not until 1981 that he really devoted himself to painting old pagodas
Not until 1981 did he really devote himself to painting old pagodas
Fourth set

TuongvanThe secret was never told until the man's death. OK
Until the man's death, the secret was never told OK
It was not until the man's death that the secret was ever told >> ever is not correct, otherwise OK. It has a different meaning than the first two.

It was nevernot until the man's death that the secret was told>> never is not correct
Never until the man's death was the secret told OK
Thank you AlpheccaStars,

But
I am still confused about why you say " It was not until the man's death that the secret was told" has a different meaning than "The secret was never told until the man's death" and " Until the man's death, the secret was never told "

Could you possibly explain?
Students: We have free audio pronunciation exercises.
It was not until the man's death that the secret was told. >> In this sentence we know for sure that the secret was told, and that happened when the man died.

Until the man's death, the secret was never told >> It is clear that the secret was not told before he died, but we don't know what happened after that. Maybe it was told, maybe not.
Thank you AlpheccaStars. So the difference lies in "never" .I see it now.

How about these sentences? Do the have the same meaning?:

He did not come home until 11pm yesterday
Not until 11pm yesterday did he come back home
It was not until 11pm yesterday that he came back home
The only difference is the word order. The logic (and the meanings) are the same.
Students: Are you brave enough to let our tutors analyse your pronunciation?
Thank you AlpheccaStars very much