Should he need an operation,she would take him to the hospital.
如果他需要動手術,她會帶他去醫(yī)院的.
這是一個虛擬語氣,所以主句用would
后面用had addressed答案是had taken 和having been addressed 怎么填的不清楚這句話完整的說是這樣1----His letter,which has been addressed to the wrong number, reached me later.逗號不能落下，后面which has been addressed to the wrong number這句是原因分句。若是去掉which的話，就是2----His letter, having been addressed to the wrong number, reached me later.要么用had taken, 則表示3-----His letter had taken to the wrong number, reached me later.這句則表示事情前后進過。