when sb.do sth.还是 when sb.doing sth.如When my mother ________(cook) meals for us in the kitchen I often go there to help her.
问题描述：
when sb.do sth.还是 when sb.doing sth.
如When my mother ________(cook) meals for us in the kitchen I often go there to help her.
答
怎么可以用doing呢，这里应该是谓语，应该用be doing
When my mother __is cooking__ meals for us....
答
cooking When my mother ________(cook) meals for us in the ki...
答
应该是cooks吧
答
果断猜测doing