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The progressive aspects (also called "continuous tenses") are formed by using the appropriate tense of estar + present participle (gerundio), and the perfect constructions are formed by using the appropriate tense of haber + past participle (participio). When the past participle is used in this way, it invariably ends with -o.
The skills and competencies considered "21st century skills" share common themes, based on the premise that effective learning, or deeper learning, requires a set of student educational outcomes that include acquisition of robust core academic content, higher-order thinking skills, and learning dispositions.
The present progressive is formed by first conjugating the verb estar or seguir, depending on context, to agree with the subject, and then attaching a gerund of the verb that follows. The past (imperfect) progressive simply requires the estar or seguir to be conjugated, depending on context, in imperfect, with respect to the subject.
One has a choice between making this explicit with the expression "used to," as in (4), or using the simple past and allowing the context to make it clear what we mean, as in (3). In Spanish, these would be in the imperfect, optionally with the auxiliary verb soler. In (5), only the simple past is possible.
(Spanish: "Si yo fuera/fuese rico, compraría una casa.") [66] The perfect past subjunctive (the imperfect subjunctive of haber and then a past participle) refers to an unfulfilled condition in the past, and the other clause would be in the perfect conditional: "Si yo hubiera/hubiese tenido dinero, habría comprado la casa" ("If I had been rich ...
Telecommunications in the early 21st century are much more advanced and universal than they were in the late 20th century. Only a few percent of the world's population were Internet users and cellular phone owners in the late 1990s; while as of 2023, 67% of the world's population is online, [ 15 ] and 78% of all people aged 10 and above own a ...
21st-century Spanish politicians (49 C, 185 P) S. 21st-century Spanish scientists (9 C, 24 P) 21st-century Spanish sportspeople (3 C) W. 21st-century Spanish writers ...
The list was compiled by a team of critics and editors at The New York Times and, with the input of 503 writers and academics, assessed the books based on their impact, originality, and lasting influence.