past simple

There are regular verbs in English language:

For example

infinitive                 past

wash                      washed

open                       opened

clean                      cleaned

watch                      watched

There are irregular verbs in English

infinitive                    past

see                            saw

take                          took

make                         made

give                           gave

https://www.google.co.il/imgres?imgurl=http%3A%2F%2Fenglisheyat.net%2Fwp-content%2Fuploads%2F2014%2F04%2Fpast_simple.gif&imgrefurl=http%3A%2F%2Fenglisheyat.net%2F%25D8%25B5%25D9%258A%25D8%25BA%25D8%25A9-%25D8%25A7%25D9%2584%25D9%2585%25D8%25A7%25D8%25B6%25D9%258A-%25D8%25A7%25D9%2584%25D8%25A8%25D8%25B3%25D9%258A%25D8%25B7-past-simple-%25D8%25A7%25D9%2584%25D8%25A3%25D8%25B2%25D9%2585%25D9%2586%25D8%25A9-%25D9%2582%25D9%2588%25D8%25A7%25D8%25B9%2F&docid=kNuiYXeVr73rkM&tbnid=chSFzNs7UtV_NM%3A&vet=1&w=523&h=373&safe=strict&bih=794&biw=1600&q=past%20simple%20%D8%B4%D8%B1%D8%AD&ved=0ahUKEwiI7ofK4NDSAhVEC8AKHUsxAwgQMwgtKAAwAA&iact=mrc&uact=8

We use it for actions that happened in the past:

https://www.youtube.com/watch?v=ZWZ6cNq6bEY