Thanks for sharing your ideas with me. I had learned
　　　 many things from you.

　　I have learned many things from you.

　　　　謝謝你和我分享你的想法。我已經從你那邊學到很多東西。

從本例中之第一句話可知，正確情境為「現在」，即
「至目前為止已經」，故用現在完成式。