www.khanacademy.org/humanities/grammar/syntax-sentences-and-clauses/types-of-sentences/v/simple-and-compound-sentences-syntax-khan-academy
www.khanacademy.org/humanities/grammar/parts-of-speech-the-verb/linking-and-helping-verbs/e/auxiliary--helping--verbs
www.khanacademy.org/humanities/grammar/parts-of-speech-the-verb/introduction-to-verbs/e/identifying-verbs
www.sadlierconnect.com/anonymous/product.html?productId=4
The blogs listed below are good sources for book reviews, book recommendations, and discussions on reading .
medinger.wordpress.com/ (Educating Alice)