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So it's correct to say either “the boat sank” or “the boat sunk.” The past participle is “sunk,” as in “the boat has sunk” or “the boat was sunk.” In case you're wondering, the same is true for “shrink.” The same three American dictionaries allow either “shrank” or “shrunk” in the past tense.
Also question is, how do you use sunk and sank?
Sank and sunk are two conjugations of the verb sink, which means to descend or fall.
- Sank is the simple past tense conjugation of the verb.
- Sunk is the past participle.
Keeping this in view, what is the past tense of to sink?
The principal parts of the verb "to sink" are actually "sink, sank, sunk": present tense, past tense, past participle. "Sank" is the simple past - something that happened at one specific past moment in time, sometimes called the Preterit. "Sunk" is the past participle.
Snuck as the past tense form of the verb 'sneak' is considered to be a real word chiefly used in North American English. The past tense and past participle most commonly used for this verb is sneaked, as in: The thief sneaked in through the backdoor.