she told me that she had had to learn almost everything again.里面的两个had是怎么回事.

题目

she told me that she had had to learn almost everything again.里面的两个had是怎么回事.
如题,课文里看到的.老湿也讲不明白,见过have had 连着的 .hadhad没见过,前面told已经是过去式了,为啥还是hadhad.

答案

前一个had为过去完成时标志,后一个had to表示不得不,个人观点,希望有用