Please pay attention to the Pinyin Final (韵母) - 'e' this Chinese character '可' carries, which connects it with the other example symbols.
pinyin: kě

Chinese phrase: 可是 kě shì - but

Examples:
河
pinyin: hé, meaning: river
Chinese phrase: 黄河 huáng hé - the Yellow River

何
pinyin: hé;
Chinese phrase: 何时 hé shí - when