I teach ESL in a foreign country. As a native speaker, I have a strong intuitive grasp of English grammar, but I often find it difficult to explain grammar concepts to my students (or other teachers). Can someone recommend a website(s) that can aid me? Preferably, the site should be searchable (so, if I, for example, want to look up how to use “just” in a sentence, or want to research determiners, I can find the information easily). And I mean a website with information already available (in reference/tutorial form), not a website where I can post specific grammar questions (of which I already know a few).