2nd person singular simple past tense of can1.
- Also could·est [kood-ist]. /ˈkʊd ɪst/.
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How to use couldst in a sentence
Nor hast thou ever known, Aspasia,Or couldst thou comprehend the thoughts that onceThou didst inspire in me.The Poems of Giacomo Leopardi | Giacomo Leopardi
God answered him, "I have suffered him these hundred years, although he dishonored me; and couldst not thou endure him one night?"Library Notes | A. P. Russell
“I thought thou couldst shoot true, Shumilana,” whispers Mandevu.Forging the Blades | Bertram Mitford
What knowest thou of this, for I think thou couldst not have been far from this place at sundown yesterday?A Frontier Mystery | Bertram Mitford
A right Conjurer might I name thee, couldst thou conjure back into these wooden tools the divine virtue they once held.Sartor Resartus | Thomas Carlyle
British Dictionary definitions for couldst
archaic used with the pronoun thou or its relative form, the form of could
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012