corrugate的一般过去时怎么写？

corrugate的第三人称单数（三单）为：corrugates...

corrugate的现在进行时为：corrugating...

corrugate的现在完成时为：corrugated...

Good stiffness, outer cover of corrugate or smooth surface finished is weather proof.胶管具有较好的挺性, 外胶层耐老化,表面有波纹型和平面型两种....

vt.（使某物）起皱褶，起皱纹，起波纹n.皱，车辙，畦，沟...

corrugate的音标：corrugate的英式发音音标为：['kɒrʊgeɪt]corrugate的美式发音音标为：['kɔrəˌɡet, 'kɑr-]...