English grammar | Present Perfect The present perfect is used to say what has happened recently and has an effect on the present moment. We often use 'just', 'yet' and 'already' to express the relationship to the present moment. Examples Have you seen Mary yet? They've already had dinner. She's just been to the dentist's. The present perfect is also used to express something which has happened up to the present moment of time. Examples Have you worked here for a long time? Peter's lived here since 1987. She hasn't had much fun this week. Positive Form Subject + have + past participle + object(s) Examples Peter's lived here since 1987. We've been very busy today. Negative Form Subject + have + not + past participle + object(s) Examples I haven't been to class very often this month. She hasn't had much fun this week. Question Form (Wh?) + have + subject + past participle? Examples

Past Perfect Simple They had lived in New York for 3 years before they moved to Seattle. (up to the time they moved to Seattle) Past Perfect Continuous She had been studying for 4 hours when he arrived. (The four hours directly before he arrived) Now, let's take a look at the specific differences between the two forms: Past Perfect Simple is used to express finished activity before a specific point of time in the past. Example: He had already eaten when his wife came home. Past Perfect Continuous is used to express continuous/progressive activity up to a specific point of time in the past. Example: They had been waiting for 2 hours before their friends finally arrived.

Past Perfect Continuous Listed below are uses with examples, and the structure of the past perfect continuous tense. Something that had been happening before something else took place I had been working for three hours when you arrived. Susan had been thinking about the idea for a while when Bob made the suggestion.   Something that had been happening over a period of time in the past up until another point in the of past I had been playing tennis for two hours when I sprained my ankle. Jack had been studying for two years when he was drafted into the army.   Something that had been happening in preparation for something else I had been practicing for three days and was ready for the concert. Tom had been studying hard and felt good about the test he was about to take.   In the third conditional to express imagined conditions If I had been working on that project, we would have been successful. She would have been ready for the test if she had been prep