Formal:
* 让我失望 (ràng wǒ shīwàng) - This is the most literal translation and means "make me disappointed".
* 令我失望 (lìng wǒ shīwàng) - This is a more formal and polite way of saying "disappoint me". It is often used in written communication or when addressing someone of higher status.
Informal:
* 让我很失望 (ràng wǒ hěn shīwàng) - This emphasizes the level of disappointment.
* 让我太失望了 (ràng wǒ tài shīwàng le) - This means "you have disappointed me a lot".
* 你让我失望 (nǐ ràng wǒ shīwàng) - This directly addresses the person who disappointed you.
Example sentences:
* 你让我很失望 (nǐ ràng wǒ hěn shīwàng) - You really disappointed me.
* 他的行为令我失望 (tā de xíngwéi lìng wǒ shīwàng) - His behavior disappointed me.
* 这次考试的结果让我太失望了 (zhè cì kǎoshì de jiéguǒ ràng wǒ tài shīwàng le) - The results of this exam disappointed me a lot.
Note:
* The sentence structure can be adjusted to fit the specific situation. For example, you can add more details about what specifically disappointed you.
* The level of formality should be chosen according to the context and your relationship with the person you are speaking to.