To establish the difference between the use of ‘has/have’ and that of ‘had’, one needs to understand the essence of the past perfect tense. When two things occurred in the past ...

The perfect tense is used to say what you did or what you have done in the past. To form the perfect tense you need a subject, an auxiliary verb and a past participle. Perfect tense with 'être ...

you will need to use a past tense. In German, you can use the perfect tense. This also exists in English to show that you have done something: The perfect tense: How to talk about the past in ...