कह

In a sentence

• मुझे वह कहानी फिर से कहो।

  Tell me that story again.

  In this sentence, 'कहो' (kaho) means 'tell,' as a polite imperative form to ask someone to retell.

• क्या तुम सच कह रहे हो?

  Are you telling the truth?

  Here, 'कह' (keh) forms the word 'कह रहे हो,' meaning 'are telling' in present continuous tense.

• लोग कहते हैं कि वह बहुत अच्छा है।

  People say that he is very good.

  In this sentence, 'कहते' (kahte) is used to mean 'say,' referring to the general opinion or statement by people.