在离开前，老师交代了学生们的寒假作业。

Zài líkāi qián, lǎoshī jiāodài le xuéshēng men de hánjià zuòyè.

Before leaving, the teacher assigned winter vacation homework to the students.

在演出前导演交代了演员们的表演要点。

Zài yǎnchū qián dǎoyǎn jiāodài le yǎnyuán men de biǎoyǎn yàodiǎn.

Before the performance, the director explained the key points of the actors' performances.

经理交代了下周的工作安排和重要事项。

Jīnglǐ jiāodài le xià zhōu de gōngzuò ānpái hé zhòngyào shìxiàng.

The manager outlined the work schedule and important matters for next week.