 These 21 short videos will help you quickly see and understand the relationships and patterns among various types of irregular verbs in English so that you can use them correctly. Verbs like THINK This video will help you see relationships among various types of irregular verbs in English. The key to understanding irregular verbs is to look for and notice the patterns. Verbs like THINK use OTT or OTT in the past and past participle. Here are some examples. THINK THOT THOT Bring, brought, brought. We mentioned that one before. By, bought, bought. Seek, sought, sought. Fight, fought, fought. Now the last two have the same sound in the past and the past participle, OTT. But the spelling is different. Catch, caught, caught. Teach, taught, taught. Also you'll notice that with the S form we have to add an ES rather than just a single S. Catch us, teach us.