to
leave, left, left, to put put put through, to clear cleared cleared up, to export, exported, exported, to think, thought, thought, to let, let, let, to
ship, to require, required, required, to go, went, gone, to have, had, had, to get, got, got, to find, found, found, to swim, swam, swum, to spend, spent, spent, to
hear, heard, heard, to listen, listened, listened, to sell, sold, sold, to buy, bought, bought, to bring, brought, brought, to come, came, come, to speak, spoke, spoken.