judging from what they have done in the past few years.请问这个w

judging from what they have done in the past few years.请问这个w in the past few years i have many difficulties w what you have done in the past. what have you done in the past. in the past few years Think what you have done in the past.为什么不是what have you done In the past (a few;few)years,great changes have taken place In the past few years there in the past few years中的few是什么意思 in the past few years there have been great changes in my ci in the past few years,they ———many children find their famil in the past few years和over the past few years有什么区别?