Pronunciation: [wˈɜːt ˌɒn djˈuːti] (IPA) 
The correct spelling of the phrase "wert on duty" is actually "we're on duty." The contraction "we're" represents the words "we are" and is pronounced /wɪər/. The incorrect spelling likely arises from confusion with the archaic form of the verb "to be," which uses "wert" as the second person singular past tense. However, in contemporary English, "we're" is the correct and commonly used contraction for "we are."
"Wert on duty" is an archaic phrase that originates from Old English and has its roots in Middle English usage. The phrase consists of three components: "wert," "on," and "duty."
"Wert" is the second person singular past tense of "to be" in Old English, specifically used when referring to the second person singular pronoun "you." This old form of "were" indicates a state of being or existence in the past.
"On" is a preposition that denotes a state of being positioned or situated in a particular place or location.
"Duty" refers to a moral or legal obligation, responsibility, or task that one is required to fulfill. It can also pertain to a commitment, duty, or role within a specific context.
Therefore, when combined, the phrase "wert on duty" implies that an individual was positioned or situated in a particular place or location while fulfilling a moral, legal, or assigned obligation or responsibility. It suggests that the person referred to was actively engaged in the performance of their duties or responsibilities during a certain period in the past.
As English has evolved, this phrase has become archaic and is rarely used in contemporary language. However, it remains a testament to the linguistic heritage of the language and provides insights into historical usage and context.
