It became dark before I knew it.

Source: Tatoeba

From the look of the sky, it may rain in the afternoon.

Source: Tatoeba

Judging from the look of the sky, it may rain this afternoon.

Source: Tatoeba

It is pitch dark.

Source: Tatoeba

It is getting lighter outside.

Source: Tatoeba

Dark as it was, we managed to find our way home.

Source: Tatoeba

The sky darkened.

Source: Tatoeba

It's getting dark. Please turn the light on for me.

Source: Tatoeba

It was already very late.

Source: Tatoeba