Spelling is traditionally thought to be an elementary level topic. Yet, even advanced students occasionally misspell verb endings,
which means that there is more to spelling than knowing the rules. It is practice that makes perfect not theory. EnglishLab.Net Spelling Quizzes are available online for anyone who wishes to practise spelling such verb endings as -(e)s, -ed & -ing.
If you want to study English, Estonian or Russian online in the EnglishLab.Net Virtual Classroom, read about the tutor and email her to arrange for a VIP online language course