not been seen since vs not been seen since then

Both phrases are correct, but they are used in slightly different contexts. 'Not been seen since' is a common phrase used to indicate that something has not been observed or encountered since a specific time or event. On the other hand, 'not been seen since then' adds emphasis by explicitly referring back to a particular point in time. The choice between the two depends on the desired level of specificity in the statement.

Last updated: April 01, 2024 • 643 views

not been seen since

This phrase is correct and commonly used in English.

This phrase is used to indicate that something has not been observed or encountered since a specific time or event.

Examples:

The cat has not been seen since yesterday.
He has not been seen since the accident.
The book has not been seen since it was borrowed.

Show examples from the web [+]

whereas the internationally renowned artist and critic of the regime, Ai Weiwei, has not been seen since he was detained while passing through security checks at Beijing airport on Sunday, 3 April,
In the United States 10-year government bond yields reached levels that had not been seen since before the mid-1960s.
Moe has not been seen since Dom was killed.
Prophetic words, for the madame disappeared and has not been seen since.
The antique shop's Kim Woo-jin has not been seen since this afternoon.
An acquaintance of mine left Margo's Diner this morning and has not been seen since.
He's not been seen since the emergency began.
Carne has not been seen since Whitworth's death.
Moe has not been seen since Dom was killed.
She has not been seen since.
He's not been seen since.
He has not been seen since his liaison with the haberdasher wilted on the vine.
The 14-year-old schoolgirl has not been seen since she left home
Kris Taylor, the brother, has not been seen since yesterday.
Eric Northman was sent to break up a group of Wiccan practitioners and has not been seen since.
More than 500000 people take to the streets every day to demonstrate on a scale that has not been seen since the country gained independence.
One of your own, Sheriff Eric Northman... Was sent to break up a group of Wiccan practitioners and has not been seen since.
Ms. Stangard, a 21-year-old student of the Philadelphia university, has not been seen since friends saw her leaving a fraternity party earlier this week.
Indeed, such strong loan growth dynamics have not been seen since the introduction of the euro in 1999.
During the night of 29 January he was taken away by armed men and he has not been seen since.

Alternatives:

has not been observed since
has not been encountered since
has not been noticed since

not been seen since then

This phrase is correct and adds emphasis by explicitly referring back to a particular point in time.

This phrase is used to emphasize that something has not been observed or encountered since a specific time or event by explicitly mentioning 'then'.

Examples:

The missing keys have not been seen since then.
She has not been seen since then.
The old building has not been seen since then.

Show examples from the web [+]

Certainly she's been seen since then?
But what have we seen since then?
Moe has not been seen since Dom was killed.
Prophetic words, for the madame disappeared and has not been seen since.
The antique shop's Kim Woo-jin has not been seen since this afternoon.
An acquaintance of mine left Margo's Diner this morning and has not been seen since.
Such tellingly described manipulation has not been seen since the totalitarian regimes collapsed years ago.
He's not been seen since the emergency began.
Carne has not been seen since Whitworth's death.
Moe has not been seen since Dom was killed.
She has not been seen since.
He's not been seen since.
He has not been seen since his liaison with the haberdasher wilted on the vine.
Kris Taylor, the brother, has not been seen since yesterday.
Eric Northman was sent to break up a group of Wiccan practitioners and has not been seen since.
The 14-year-old schoolgirl has not been seen since she left home
More than 500000 people take to the streets every day to demonstrate on a scale that has not been seen since the country gained independence.
One of your own, Sheriff Eric Northman... Was sent to break up a group of Wiccan practitioners and has not been seen since.
In the United States 10-year government bond yields reached levels that had not been seen since before the mid-1960s.
Ms. Stangard, a 21-year-old student of the Philadelphia university, has not been seen since friends saw her leaving a fraternity party earlier this week.

Alternatives:

has not been observed since that time
has not been encountered since that moment
has not been noticed since that event

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not been seen since vs not been seen since then