Expletives are usually wasted words and if they are overused they can lead to unclear or uninteresting writing.
LOOK FOR: Any sentence (or phrase) that begins with "It is..." "There are..." etc. and fix the error by finding the real subject of the sentence and using it in place the empty words.
INSTEAD OF: It is evident that we will not meet our goal.
USE: We will not meet our goal.
Although expletives may not convey any real meaning to the sentence, they can still have a grammatical purpose. For example, by using "There..." at the beginning of the sentence, the subject moves to a spot later in the sentence – where it can be emphasized. Sometimes, lyrical writing makes use of this style.
Ring the bells that still can ring
Forget your perfect offering
There is a crack, a crack in everything
That’s how the light gets in.
–Leonard Cohen, from his song “Anthem,” off the 1992 album The Future.
Expletives are not always bad words
Reduce expletive constructions
What are expletive constructions and why should I avoid them?