The past tense of Preserves is preserved.
noun. ['prəˈzɝːvz, prɪˈzɝːvz, priːˈzɝːvz'] fruit preserved by cooking with sugar.
1. Noun, plural Sonoma State University features several preserves that are open to the public for tours. 2. Verb, 3rd person singular present While you can freeze it raw, blanching it first better preserves the taste and texture of the fruit.