1. He was not certain whether he should obey her. (±×´Â ±×³àÀÇ ¸»¿¡ µû¶óµµ ÁÁÀºÁö ¾î¶²Áö ¸Á¼³ÀÌ°í ÀÖ¾ú´Ù) 2. I am certain of his succeeding. (±×ÀÇ ¼º°øÀº È®½ÇÇÏ´Ù°í »ý°¢ÇÑ´Ù) 3. They are certain to need help. (±×µé¿¡°Ô´Â ¿øÁ¶°¡ ²À ÇÊ¿äÇÏ´Ù) 4. at a certain place (ÀÏÁ¤ÇÑ Àå¼Ò¿¡) 5. feel certain (È®½ÇÇÏ´Ù°í »ý°¢ÇÏ´Ù)