Students need to wear school uniforms.

学生需要穿校服。

The students are wearing school uniforms.

学生们穿着校服。

Students should wear school uniforms to school.

学生们应该穿校服去学校。

Their school uniforms Peter's.

他们的校服与彼得的相同。

What if they don't wear school uniforms?

如果他们不穿校服怎么办？