Past simple: обычная: walked,run
отриц: didn't walk, didn't run
вопрос; Did he(I,she,you или любое другое лицо) walk, Did he (или любое другое лицо) run
past continuos: обыч: was (использ с I, He, she it) walking, was running
were использ с остальными) walking, running
отриц: wasn't/weren't walking, running
вопрос: Were/was walking, running