There are a lot of things to be done .
问题描述：
There are a lot of things to be done .
Her promise to write was forgotten .
这两个句子的定语是?
是TO BE DONE 和 TO WRITE ……是定语后置
但是为什么？定语是用于限定的名词和代词的，那么它们的限定词是？
答
to do 不定式作定语就是要后置的呀.
第一句话 to be done 还涉及到了不定式的语态问题.在there be 结构中,当说话人考虑的是必须由人去完成的某件事情时,不定式用主动形式,即to do,如果说话人强调的事情本身必须完成,则用被动形式,即to be done.如,There is a lot of work to do.
=Somebody has to do the work.
There is a lot of work to be done.
=The work has to be done.
第一句话不定式修饰的是things.
第二句话不定式修饰的是her promise.