My brothers were wathering some flowers at this time yestday. 怎么改
问题描述：
My brothers were wathering some flowers at this time yestday. 怎么改
答
at接的不应该是时间，去掉at
答
去掉at就对了。
this time 这次，这回
表达的意思不局限于时间了，是与以前(last time)相比较
如 He defeated me last time, but I will win this time.(他上次打败我了，不过这次赢的人是我）
没有at this time的用法
答
----------My brothers were watering some flowers this time yesterday.
答
没有错误吧。我兄弟昨天的这个时候在浇花。