Grammatical Expletive
An empty opening such as “there is” or “it is” that delays the real subject.
Why it’s missed
It sounds natural in conversation, so it slips into a first draft.
Why it matters
A clear subject gives a sentence energy and direction.
Weak
There are three habits that helped me write.
Better
Three habits helped me write.
Quick fix · Ctrl+F
there is, there are, it is. Move the real subject to the front.
It is important that writers develop a daily routine.
Author’s note: Keep an empty opening when it creates deliberate suspense—not by default.