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#1 doesn't make sense because the present tense has no duration.

We are married.

This means we are married right now. It has no duration. It's now.

We have been married.

In the past we existed in the state of marriage. This state occurred for some amount of time, starting in the past, and continuing until a later point in time, which may be the present. It has a duration, but we don't know how long.

We have been married for five years.

In the past we were married. This lasted for five years. It's implied that the end of the five years is now, meaning we're still married. If it lasted for five years, but started more than five years ago, then I would expect "we were married for five years", as the state of marriage is now wholly in the past.

We are married for five years.

This is nonsense. We are married now. How can now last for five years?

That being said, this could possibly be used in an informal, nonstandard register. In comments, Edwin Ashworth gave a good example of someone telling a story:

So, we get hitched. We are married for five years. This other guy shows up....

We are married.

This means we are married right now. It has no duration. It's now.

We have been married.

In the past we existed in the state of marriage. This state occurred for some amount of time, starting in the past, and continuing until a later point in time, which may be the present. It has a duration, but we don't know how long.

We have been married for five years.

In the past we were married. This lasted for five years. It's implied that the end of the five years is now, meaning we're still married. If it lasted for five years, but started more than five years ago, then I would expect "we were married for five years", as the state of marriage is now wholly in the past.

We are married for five years.

This is nonsense. We are married now. How can now last for five years?

That being said, this could possibly be used in an informal, nonstandard register. In comments, Edwin Ashworth gave a good example of someone telling a story:

So, we get hitched. We are married for five years. This other guy shows up....

#1 doesn't make sense because the present tense has no duration.

We are married.

This means we are married right now. It has no duration. It's now.

We have been married.

In the past we existed in the state of marriage. This state occurred for some amount of time, starting in the past, and continuing until a later point in time, which may be the present. It has a duration, but we don't know how long.

We have been married for five years.

In the past we were married. This lasted for five years. It's implied that the end of the five years is now, meaning we're still married. If it lasted for five years, but started more than five years ago, then I would expect "we were married for five years", as the state of marriage is now wholly in the past.

We are married for five years.

This is nonsense. We are married now. How can now last for five years?

That being said, this could possibly be used in an informal, nonstandard register. In comments, Edwin Ashworth gave a good example of someone telling a story:

So, we get hitched. We are married for five years. This other guy shows up....

1
source | link

We are married.

This means we are married right now. It has no duration. It's now.

We have been married.

In the past we existed in the state of marriage. This state occurred for some amount of time, starting in the past, and continuing until a later point in time, which may be the present. It has a duration, but we don't know how long.

We have been married for five years.

In the past we were married. This lasted for five years. It's implied that the end of the five years is now, meaning we're still married. If it lasted for five years, but started more than five years ago, then I would expect "we were married for five years", as the state of marriage is now wholly in the past.

We are married for five years.

This is nonsense. We are married now. How can now last for five years?

That being said, this could possibly be used in an informal, nonstandard register. In comments, Edwin Ashworth gave a good example of someone telling a story:

So, we get hitched. We are married for five years. This other guy shows up....