你这个时间应该是现在过去时，如果过去时要有过去的时间，比如昨天晚上。
一般过去时：My sister and I did English exercises last evening.
过去进行时：My sister and I were doing English exercisesat this time last evening.
这个句子可以这样表达:My sister and I were doing our homework.
My sister i were doing our homework.
我和我的妹妹在做我们的作业。（过去进行时）
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024