Sky darkens suddenly.

Meaning: This means that the sky is becoming darker or less bright all of a sudden, usually indicating that something is happening or about to happen.

Choice of Words: Sky is the atmosphere above the Earth that appears to be a dome or vault. Darkens means to become less light or bright. Suddenly means without warning or happening quickly. Here, the sky is described as becoming less light or bright without warning.

Alternative Expressions

The sky gets dark all of a sudden.

Meaning: This means the same as the first sentence: the sky has become darker very quickly.

Choice of Words: **The sky** is another way of saying "sky." **Gets dark** means becomes darker in color. **All of a sudden** means happening very quickly and without warning.

The sky is getting darker and darker very fast.

Meaning: This means the same as the first two sentences: the sky has become darker very quickly.

Choice of Words: **The sky** is another way of saying "sky." **Is getting darker and darker** means is becoming darker and darker in color. **Very fast** means happening very quickly.

Related Expressions