...看作非限制性分词短语,还是说动名词短语做the first step的同位语?动名词短语可以做同位语吗,有这种用法吗?根据意思,我觉得倾向于同位语2 The second step, background radiation, can be done by
going underground.这里background radiation做the se...
Mrs.Brown was much disappointed to see the washing machine she had
______ went wrong again.答案是repaired,为什么不能用it repaired呢?我的想法是这台洗衣机不是Mrs.Brown自己修的,而是她请人修的,所以填了had it repaired。
...on board船还未下锚停稳,那些人就已经爬上了船。 爬上船的动作在前,这时还没停稳锚,所以停锚动作在后。我可以理解 had climbed这个时态,为什么 anchor这个动作也要用过去完成时呢?如果改成 Before she anchored, the men from the boats...