can
How to Use Can
Learner’s notesIn plain EnglishEither the helping verb for ability/permission ("I can do it") or a metal food/drink container.
Don't confuse the modal verb "can" (ability) with "may" (formal permission) — many teachers still insist on the distinction in careful writing.
Word Forms
could past tense, couth past tense, canned past tense, could plural, can plural, cans plural, can plural, canned plural, can singular, could singular, canst singular, cannest singular, couldst singular, couldest singular, could'st singular, canneth singular, cans singular, can singular, canned singular
Fill the Gap
Can you complete this real example?
She _____ speak three languages fluently.
Etymology
The verb goes back to Old English cunnan, "to know how"; it is a distant relative of "know". The container sense comes from a separate Old English word, candel-related only by coincidence.