告诉 + Person + Clause
The verb 告诉 (gàosu) means "to tell" and takes both an indirect object (the person being told) and a direct object or clause (the information). A typical pattern is 告诉他公主来了 (tell him the princess has come).
他告诉我明天不用来了。
tā gàosù wǒ míngtiān bú yòng lái le.
He told me I don't need to come tomorrow.
请你告诉她我在等她。
qǐng nǐ gàosù tā wǒ zài děng tā.
Please tell her I'm waiting for her.
妈妈告诉孩子们要早点睡觉。
māma gàosù háizimen yào zǎodiǎn shuìjiào.
Mom told the children to go to bed early.