 And now let's take a look at the Past Perfect Continuous Tense. We'll obviously be talking about the past. We'll be talking about two actions, and here we'll be focusing on the fact that one of those actions had been continuing at another point in the past. In order to form this tense, what we need are two auxiliary verbs. We need our auxiliary verb have conjugated into the past, so it turns to had. We use our auxiliary verb be with our present participle form of the main verb, which is obviously the verb plus ing, and be being conjugated into the past as well. So for positive sentences, we would start with our subject here. It's sue. Sue had been cooking. Our negative sentence would be sue had not been cooking. And in order to ask our question again that inversion of the subject and had, so it comes out had sue been cooking.