Verb conjugation of "experimentar" in Spanish

Of course I have already tried, but it did not work. I will try it again. Meanwhile, here is the reason for my short emails... only one hand free at a time, see explanation in the image of me.
Productivity declines when it is too hot outside. Oscar therefore closed his laptop and production unit and headed towards the lake where his pretty girlfriend was waiting for him. Once he arrived he bought a ice cream as a surprise.
Why are people from beautiful Latin America immigrating to Germany? I have often experienced problems with the time forms used in Spanish. I need urgent assistance. I can correct you in German.