The perfect tense is made up of two parts. The first part is often the verb avoir ‎- ‎to have and the second part is the past participle.‎ For example, j'ai mangé un sandwich - I have eaten ...

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 ...