经典句型:It's the rush hour. 现在是上下班高峰期。

A:Why is it so crowded?
甲:怎么这么拥挤?
B:It's the rush hour.
乙:现在是上下班高峰期。
A:I can hardly breathe.
甲:我要透不过气来了。
B:We'll get off at the next stop.
乙:我们下一站下车。
A:Let's move to the rear door.
甲:我们到后门吧。

经典句型:It's so crowded. 太挤了。

A:It's so crowded.
甲:太挤了。
B:There're always so many people on this bus route.
乙:这条线路总是这么多人。
A:I will take the subway next time.
甲:下次我要坐地铁。

句型讲解：
Crowded表示“拥挤的”。如:a crowded bus 拥挤的公交车,a crowded plaze 挤满人群的广场，crowded downtown area 闹市，繁华商业区。
Packed也有“拥挤的”之意。如:The square was packed with people.广场上挤满了人。