| 释义 |
verb | noun | adjective quackquack1 /kwæk/ verb [intransitive] ETYMOLOGYquack1Origin: 1600-1700 From the sound VERB TABLEquack |
| Present | I, you, we, they | quack | | he, she, it | quacks | | Past | I, you, he, she, it, we, they | quacked | | Present perfect | I, you, we, they | have quacked | | he, she, it | has quacked | | Past perfect | I, you, he, she, it, we, they | had quacked | | Future | I, you, he, she, it, we, they | will quack | | Future perfect | I, you, he, she, it, we, they | will have quacked |
|
| Present | I | am quacking | | he, she, it | is quacking | | you, we, they | are quacking | | Past | I, he, she, it | was quacking | | you, we, they | were quacking | | Present perfect | I, you, we, they | have been quacking | | he, she, it | has been quacking | | Past perfect | I, you, he, she, it, we, they | had been quacking | | Future | I, you, he, she, it, we, they | will be quacking | | Future perfect | I, you, he, she, it, we, they | will have been quacking |
verb | noun | adjective quackquack2 noun [countable] informal ETYMOLOGYquack2Origin: (1) 1800-1900 ➔ QUACK1 (2-3) 1600-1700 quacksalver quack (16-19 centuries), from early Dutch, probably from quacken to quack, talk + salf cure 1someone who pretends to be a doctor2the sound a duck makes verb | noun | adjective quackquack3 adjective relating to the activities or medicines of someone who pretends to be a doctor: a quack remedy for colds |