| 释义 |
noun | verb reefreef1 /rif/ ●○○ noun [countable] ETYMOLOGYreef1Origin: 1500-1600 Dutch rif earth science a line of sharp rocks, often made of coral, or a raised area of sand near the surface of the ocean: the Great Barrier Reef noun | verb reefreef2 (also reef in) verb [transitive] ETYMOLOGYreef2Origin: 1600-1700 reef part of a sail tied up (14-21 centuries), from Old Norse rif VERB TABLEreef |
| Present | I, you, we, they | reef | | he, she, it | reefs | | Past | I, you, he, she, it, we, they | reefed | | Present perfect | I, you, we, they | have reefed | | he, she, it | has reefed | | Past perfect | I, you, he, she, it, we, they | had reefed | | Future | I, you, he, she, it, we, they | will reef | | Future perfect | I, you, he, she, it, we, they | will have reefed |
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| Present | I | am reefing | | he, she, it | is reefing | | you, we, they | are reefing | | Past | I, he, she, it | was reefing | | you, we, they | were reefing | | Present perfect | I, you, we, they | have been reefing | | he, she, it | has been reefing | | Past perfect | I, you, he, she, it, we, they | had been reefing | | Future | I, you, he, she, it, we, they | will be reefing | | Future perfect | I, you, he, she, it, we, they | will have been reefing |
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