Final answer:
'Time-triggers' for the imperfect tense are cues that denote habitual or ongoing actions in the past in language, different from imperfect duties which are moral obligations without specific guidelines.
Step-by-step explanation:
The 11 "time-triggers" for the imperfect likely refers to cues typically used in language learning to indicate when the imperfect tense should be used in Spanish.
Since the provided list does not directly correlate with those time-triggers, it seems there is a misunderstanding in the question. Imperfect duties, as described, refer to moral obligations that do not have specific guidelines but instead represent general moral behavior.
Misinterpretation of the Question
It appears there has been a mix-up with the terminology. The 'time-triggers' for the imperfect tense in Spanish actually refer to specific words or phrases that denote habitual actions, ongoing conditions, or incomplete actions in the past, which are typically expressed using the imperfect tense.
An example of such a time-trigger would be the phrase 'todos los días' (every day), indicating a habitual action. Other common time-triggers could include words like 'siempre' (always), 'a menudo' (often), 'nunca' (never), 'cada año' (every year), and phrases indicating time such as 'en aquella época' (at that time).
As the student's question seems to confuse moral duties with grammatical tenses, it might be helpful to clarify the intended query before providing a more targeted response.