e.g.

My advice to learners is to always use the full form, both in writing and speech ("e.g." is seldom spoken, except in imitating formal writing), because in some cases it is inappropriate even in writing. Here are some examples where you would say and write "for example," but not the abbreviation:

*He likes bowling, e.g.

*If you are in a supermarket, e.g., and somebody asks you...

*George Washington was truthful. E.g., he admitted cutting down the cherry tree.