Indicative Present (simple) : Bruno Delavigne ascertains the quality of each new fragrance formula through chemical analysis alone, since his nose has been useless for years.
Indicative Present progressive / continuous : The Delavigne Corporation's research team is ascertaining whether the new eco-friendly packaging meets Bruno's environmental standards.
Indicative Past (simple) : After the explosion that killed Xavier, investigators ascertained that a preventable fragrance fire was to blame — a fact that haunts Bruno to this day.
Indicative Past progressive / continuous : Bruno was ascertaining the source of a strange chemical odor in the Montmartre shop when he suffered the accident that cost him his sense of smell.
Indicative Present perfect (simple) : Horatio Oléré has ascertained that Bruno's recent obsession with surfing has done nothing to diminish his dedication to the Delavigne Corporation.
Indicative Present perfect progressive / continuous : Environmental activists have been ascertaining for months whether the Delavigne Corporation's green initiatives are as genuine as Bruno claims.
Indicative Past perfect : By the time the San Francisco staff arrived at the boardroom, Bruno had already ascertained that the quarterly figures were going to be very good news.
Indicative Past perfect progressive / continuous : Horatio had been ascertaining the safest running route in Pamplona for over an hour before Bruno casually mentioned he planned to sprint right alongside the bulls.
Indicative Future : The noseless perfumer will ascertain whether the new fragrance line honors his grandfather Xavier's original recipes before approving a single bottle for sale.
Indicative Future progressive / continuous : While Bruno will be ascertaining the results of the latest lab tests, Horatio will be quietly hoping none of them involve open flames.
Indicative Future perfect : By the time the Delavigne Corporation's annual charity gala begins, Bruno will have ascertained exactly how much the company can donate to fragrance fire prevention this year.
Indicative Future perfect progressive / continuous : By the end of next month, the CEO will have been ascertaining surf conditions along the San Francisco coastline for a full year — Horatio considers this a worrying development.
Conditional Simple : Bruno would ascertain the safety of every new formula himself if his sense of smell hadn't been taken from him in that long-ago accident.
Conditional Progressive : The grandson of Xavier would be ascertaining the authenticity of every ingredient in the new collection right now if the Pamplona trip hadn't intervened.
Conditional Perfect : Bruno would have ascertained the risks of that fateful day in the Montmartre shop far sooner if his grandfather had warned him about unstable fragrance compounds.
Conditional Perfect progressive : Without the distraction of his newfound passion for surfing, the perfumer would have been ascertaining the details of the new product launch for weeks by now.
Imperative Imperative : "Ascertain the exact cause of that lab incident before anyone leaves the building tonight," Bruno told his San Francisco team, channeling every lesson Xavier had ever taught him about fragrance safety.
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