Some verbs must always be followed by infinitives and/or gerunds. This resource has example sentences about this and some practice sentences to edit on your own.
Some words, depending on their form, have different meanings, like bored/boring or interested/interesting. This tutorial shows more of these examples and gives sentences for practice editing.
A great resource for practice quizzes on nearly any grammar concept! You can start out with easier quizzes to see what you need to practice more, and you can also take quizzes on specific grammar aspects like articles, prepositions, verbs, and more!
Can be searched for both current and historical definitions of a word, as well as provide quotations and the ability to search for the occurrence of a word in any definition. Updated periodically.
The Carnegie Mellon University Pronouncing Dictionary is an open-source machine-readable pronunciation dictionary for North American English that contains over 134,000 words and their pronunciations.