crum·pleBrE/ˈkrʌmpl/NAmE/ˈkrʌmpl/verbpresent simple - I / you / we / theycrumpleBrE/ˈkrʌmpl/NAmE/ˈkrʌmpl/present simple - he / she / itcrumplesBrE/ˈkrʌmplz/NAmE/ˈkrʌmplz/past simplecrumpledBrE/ˈkrʌmpld/NAmE/ˈkrʌmpld/past participlecrumpledBrE/ˈkrʌmpld/NAmE/ˈkrʌmpld/ -ing formcrumplingBrE/ˈkrʌmplɪŋ/NAmE/ˈkrʌmplɪŋ/