1.You can list various situations or occasions when you express gratitude by saying 'thank you'. 2.Explain the importance of expressing gratitude in different contexts, such as showing appreciation, politeness, or acknowledging help.

1.你可以列舉各種情況或場合，當你說「thank you」來表達感謝時。 2.解釋在不同情境下表達感謝的重要性，例如表達欣賞、禮貌或感謝幫助。