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.
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