Simple sentences are groups of words that express complete thinking and contain both a subject and a verb (predicate). You must match others in number (singular or plural). For example, you are an ace. Have you noticed that there are often dialogues in almost all ESL/EFL manuals to introduce the target language? Most students (and also teachers) shine through them on their way to more important things. But this is not necessarily the case. Here`s one of my best tips for teaching with the specialized verb agreement: then have all students say the sentence out loud. Delete the first word and students can repeat it. Eventually, students will say the whole sentence, but there will be nothing on the board. At the end, you can let students write the memory sentence in their notebooks (optional).