How do I form the past tense using 'avoir?'

The past tense you are talking about is called the 'past perfect.' This means that it would be used to describe something you did once at a specific point, like a sport you played last weekend, or something you bought in the supermarket earlier that day. 3 Step MethodIn order to form the past perfect using 'avoir,' you must think about all the parts of the sentence you need. You need a...SUBJECT (je, tu, il/elle, nous, vous, ils/elles)THE HELPER (AUXILIARY) VERB (ai, as, a, avons, avez, ont). This must agree with the subject.THE PAST PARTICIPLE (joué, fait, écrit, tombé, mangé etc.)That, is the past perfect with avoir! You should know the right conjugations for 'avoir' from when you first started French, so steps 1 and 2 should be no problem for you. The hardest part of the past perfect tense is memorising all the past participles. Luckily, the past participle does NOT change, even if the subject changes, and there are patterns that you can learn to make this easier. How to Figure Out the Past ParticipleWe will start with the most common (and easiest) type of past participle. Verbs ending in -er. I will use 'manger' (to eat) as an example. Take the verb 'manger' and remove the 'er.'You will now have the stem 'mang.'Add the ending 'é' - this is the past participle! Mangé! J'ai mangé une pomme.I'll use another 'er' verb as another example...Take the verb 'jouer' and remove the 'er.'You will now have the stem 'jou'Add the ending 'é' - this is the past participle! Joué! Elle a joué au tennis. Now, write down some practice sentences. Use the verbs 'manger, jouer, écouter, regarder.' Try to vary the subjects you use, don't just use 'je.'