It seems like/as if/as though/that their marriage is over.

[kadioguy]

a. It seems like their marriage is over.
https://www.macmillandictionary.com/dictionary/british/it-seems

b. It seems as if/as though their marriage is over. [my version]
c. It seems that their marriage is over. [my version]
---
Do all work and mean the same? I mean, are It seems like/as if/as though/that (followed by a clause) interchangeable?

 

[tedmc]

d. It seems their marriage is over.
e. Their marriage seems to be over.

They are just different ways of saying the same thing.

 

[teechar]

Do they all work and mean the same?

Yes, and yes.