Abstract. This paper argues for a constructionist approach for Aspect by exploring the idea that viewpoint aspect does not exert any altering force on the situation aspect properties of predicates. The proposal is developed by analyzing the point of view where conflicts between situation and viewpoint aspect have been argued to appear in previous literature, namely, the imperfective. The paper focuses on the syntax and semantics of the imperfective, which has been attributed a coercer role as a de-telicizer and de-stativizer in the progressive reading, and as a de-eventizizer in the so-called ability (or attitudinal) and habitual readings. This paper proposes that this is not necessary and provides a unified semantics for the imperfective preserving the properties of eventualities throughout the derivation. The article defends that the semantics of viewpoint aspect is encoded in functional heads containing interval-ordering predicates and quantifiers. This richer structure allows us to analyze aspectual forms with in principle contradictory content such as perfective and progressive, which sheds light onto other issues such as the understanding of non-culminating accomplishments. The proposed syntax is argued to have a corresponding explicit morphology in languages such as Spanish and a non-differentiating one in languages such as English, while the syntax-semantics underlying both of these languages is argued to be the same.