Here are five simple expressions to say in Chinese when you feel tired: 1. 我累了 (wǒ lèi le) - This phrase means "I am tired." It is a simple and direct way to express tiredness in Chinese.
 2. 我好累 (wǒ hǎo lèi) - This phrase means "I am so tired." It is a slightly more casual way of expressing tiredness.
 3. 我真的很累 (wǒ zhēn de hěn lèi) - This phrase means "I am really tired." It is a way to emphasize that you are feeling very tired.
 4. 我感到有点累 (wǒ gǎn dào yǒu diǎn lèi) - This phrase means "I feel a little tired." It is a way to express that you are feeling tired, but not extremely tired.
 5. 我现在好累啊 (wǒ xiàn zài hǎo lèi a) - This phrase means "I am so tired now." It is a more casual way of expressing tiredness.