This week I came across a particular grammatical error several times in material I was editing for others – the comma splice. This is what its called when two sentences are joined with a comma instead of a full stop. Here is an example:
Jane skipped down the road, she was very happy.
Lots of people make this mistake, so it must be hard for them to notice. If the sentence above doesn’t feel strange to you, then it might be hard for you to notice too and you might have to check your writing carefully.
Comma splices can be fixed in a number of ways. A simple way is just to replace the comma with a full stop, but there are other ways too. Robin L. Simmons at Grammar Bytes has a nice simple guide here: http://www.chompchomp.com/terms/commasplice.htm