I4: Don’t Use a Semicolon Where it Should be a Comma

I4: Don’t Use a Semicolon Where it Should be a Comma:  Don’t use a semicolon where you should be using a comma.

I would eat another slice; but I still want ice cream.  (Incorrect)

I would eat another slice, but I still want ice cream. (Correct)

When Vito smiled; the rest of the crowd smiled too.  (Incorrect)

When Vito smiles, the rest of the crowd smiled too.  (Correct)

Bertha’s ring is one of a kind; therefore very expensive.  (Incorrect)

Bertha’s ring is one of a kind, therefore very expensive.  (Correct)