PAST SIMPLE:


http://www.iessuel.es/portal/attachments/article/198/08-stage_3_17_past_simple_affirm_neg_questions_short.pdf

http://www.satriwit3.ac.th/files/1107091010014247_13101512123153.pdf

https://ngl.cengage.com/assets/downloads_b/marketing_downloads/142407908X/1603/GIC1_unit8.pdf

Here, you have a video of pronunciation of -ed in past simple