何 (なに／なん) means “what.” It is used to ask about things, actions, or information. The reading changes depending on the following sound. Key points: • 何 (なに) is common before particles: 何を, 何で • 何 (なん) is common before です/だ or counters: 何ですか, 何人 • Use it to ask about objects, activities, or details • Often appears with particles like を, が, で Example: “これは何ですか” means “What is this?” “何を食べますか” means “What will you eat?” The reading “なん” is used before です and many counters: 何ですか, 何人 (なんにん). For other cases, “なに” is safer. Practice by asking simple questions: 何をしますか, 何が好きですか, 何で行きますか.