I used to hate studying, but now I love it very much.
I used not to like study, but now I like it very much
I didn't use to like studying,but now I love it very much.
I used to hate studying,but now I love it very much.
used to过去常常,否定形式为didn't use to(现在英语一般都用美式)
I wasn't found of English,but now yes,用used to好土