behind的用法總結

例句：

Her scarf streamed behind her.

她的圍巾在身後飄動。

She closed the gate behind her.

她隨手關上了身後的大門。

Keith wandered along behind him.

基思跟在他後面閒逛。

What's the idea behind this?

這背後的.意圖是什麼？

The sun went behind a cloud.

太陽躲在了一朵雲的後面。