我想知道英语主动形式表被动意义的结构有几种？

1 This job is easy/ hard / difficult / interesting / boring to do (不定式)
2 This book is worth reading (动名词)
3 This work needs /wants / requires doing again(动名词)
== this work needs / wants / requires to be done again（不定式）.
4 With so much work to do now, i can't go out with you.(不定式)
5 This pair of shoes wears well / comfortably.
6 His books sell well.

1.sth + need / want /require + doing
物做主语
the bike needs repairing
2. be worth doing
the film is worth seeing
3.sell ,wash .dry .等词与副词连用时
the book sells well

有很多种