Writing the past simple of regular verbs in English is quite easy, but...
do you know how to pronounce <-ed>?
There are some rules:
RULE 1. If the verb ends in the sounds / t / or / d /: <-ed> is pronounced / ɪd /
to visit : visited / ɪd / to decide: decided / ɪd /
to stop: stopped / t / to watch: watched / t /
/ t /
to walk: walked / t / to finish: finished / t /
to kiss: kissed / t / to laugh: laughed / t /
RULE 3.If the verb ends in a sound which is not in rule 1 o rule 2: <-ed> is pronounced / d /
to travel: travelled / d / to play: played / d /
to discover: discovered / d / to live: lived / d /
to open: opened / d / to rob: robbed / d /
Listen to a native speaker pronouncing <-ed>
Here you have a video with some common regular verbs in English in the past simple. pay attention to pronunciation: