Some verbs must always be followed by infinitives and/or gerunds. This resource has example sentences about this and some practice sentences to edit for practice.
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 to 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!