过去进行时 past continuous tense ; Past Progressive ; was doing ; The Past Continuous

过去进行时的形式 Forms of the Past Progressive

过去进行时态 Past Continuous

学习过去进行时态 The Past continuous Tense

与过去进行时 used to do

变成过去进行时 I am playing football

改为过去进行时 Seth played on the computer last Sunday

过去进行时疑问句 Were you doing your homework

过去进行时否定句 I wasn't doing my homework

一般现在、过去进行时 was walking here