释义 |
ascertainascertain /ˌæsɚˈteɪn/ ●○○ verb [intransitive, transitive] ETYMOLOGYascertainOrigin: 1500-1600 Old French acertainer, from certain VERB TABLEascertain |
Present | I, you, we, they | ascertain | | he, she, it | ascertains | Past | I, you, he, she, it, we, they | ascertained | Present perfect | I, you, we, they | have ascertained | | he, she, it | has ascertained | Past perfect | I, you, he, she, it, we, they | had ascertained | Future | I, you, he, she, it, we, they | will ascertain | Future perfect | I, you, he, she, it, we, they | will have ascertained |
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Present | I | am ascertaining | | he, she, it | is ascertaining | | you, we, they | are ascertaining | Past | I, he, she, it | was ascertaining | | you, we, they | were ascertaining | Present perfect | I, you, we, they | have been ascertaining | | he, she, it | has been ascertaining | Past perfect | I, you, he, she, it, we, they | had been ascertaining | Future | I, you, he, she, it, we, they | will be ascertaining | Future perfect | I, you, he, she, it, we, they | will have been ascertaining |
formal to find out something: Read labels to ascertain the amount of fats in processed foods.ascertain how/when/why etc. We’re still trying to ascertain who was driving the car. [Origin: 1500–1600 Old French acertainer, from certain]—ascertainable adjective |