Maybe. If you were The Beatles and were about to say "It has been a hard day's night" you might shorten "it has" by leaving out the "ha" and adding an apostrophe, making it into "it's" as in "It's been a hard day's night." But you might be the Bee Gees and be about to say "It is a holiday". You could shorten that by replacing the second letter I with an apostrophe, making it "It's a holiday."
In other words "it's" can mean "it has" or "it is" and you will know from the context which one it is because if the Beatles said "It is been a hard day's night" or the Bee Gees said "It has a holiday" it wouldn't (that means the same as would not you know) make any sense.
Yes they mean the same thing.
Yes they mean the same thing.
Yes, they can mean the same thing.
No, they are not the same thing. Mean and average are the same thing.
Shabby and different do not mean the same thing.
These two words can mean the same thing.
It can mean the same thing if you use it right:It's a solid source.It's a dependable source.They SOMETIMES can mean the same thing.
Loyal and faithful mean essentially the same thing.
Yes, sanctuary and refuge mean the same thing.
yes grain mean the same thing as particale
Stopping and quitting are not same. Stopping is standing on the same place you have been stopped. Quitting is moving away from the place where you stand.
Yes. They can mean the same thing.