当你离开的时候不要忘了关窗子。

Don't forget to shut down the Windows when you leave.

youdao

当你离开时，别忘了关窗户。

Don't forget to close the window when you leave.

youdao

当你离开教室的时候，别忘了关窗户。

Don't fet to close the window when you leave the classroom.

youdao

临走请不要忘了关窗。

Please remember to close the Windows before you go.

youdao

他们忘了关窗户，所以只好听任雨水往屋里灌。

They forgot to shut the Windows and thereby let the rain in.

youdao

我忘了关窗户了。

I forgot closing the window.

youdao

我忘了去关窗。

I forgot to close the window.

youdao

我忘了去关窗。

I forgot to close the window.

youdao