My mother usually does shopping on Saturday.But last week she did it on Friday
句子意思:我们经常在星期六去购物,但是上个星期她在星期五去购物.
第一个动词用does,因为有usually,所以推测是一般现在时,而且主语是第三人称单数;第二个是从last week 可以知道是一般过去时,所以用动词过去式did
My mother usually does shopping on Saturday.But last week she did it on Friday
句子意思:我们经常在星期六去购物,但是上个星期她在星期五去购物.
第一个动词用does,因为有usually,所以推测是一般现在时,而且主语是第三人称单数;第二个是从last week 可以知道是一般过去时,所以用动词过去式did