Don't walk behind me; I may not lead.

不要走在我后面，我可能不会带领。

I was looking at the photos on the noticeboard when I heard a voice behind me.

我正在看公告板上的照片时，听到身后有声音。

He always stands behind me.

他总是站在我背后。

I heard footsteps behind me and turned around quickly.

我听到身后有脚步声，于是迅速转过身去。

I heard a footstep behind me and turned around quickly.

我听到身后有一个脚步声，迅速转过身去。

I'm speechless to know that so many people are behind me.

知道这么多人跟在我后面，我说不出话来。

I turned around and saw the whole mountain start to move behind me.

我转过身，看到我身后的整座山开始移动。

Concentrating on my homework I didn't notice they had sat down behind me.

我专心做作业，没注意到他们坐在我后面。

Tens of thousands of tons of snow were coming straight down the mountain behind me.

数以万吨计的雪从我身后的山上直冲下来。

Suddenly, I heard the same, cold voice behind me again.

突然，我又听到身后同样冰冷的声音。