You're welcome! It's great to hear that your students are enjoying it! Also you are right about having to give some explanation for the sentences. I just did it verbally and on the board. This lesson was also used after several lessons on sentence structures in the present, past, and progressive tenses, as my students level of English isn't that high. However, as one example, with much repetition, most of my students now know not to put the verb at the end.