I hoped to have finished the work earlier.

　　我本希望早点儿完成那项工作。

　　I intended to have helped you.

　　我本打算帮助你。

　　He seems to have bought the new book.

　　＝It seems that he has bought the new book.

　　他好像已买了那本新书。

　　She is not likely to have got our letter.

　　她很可能还没收到我们的信。

　　[即时演练1]　用所给词的适当形式填空

　　①(2016·北京高考改编)To_make (make) it easier to get in touch with us, you'd better keep this card at hand.

　　②(2014·陕西高考改编)To_work (work) out the difficult maths problem, I have concluded Professor Russell several times.

　　③(2013·山东高考改编)I stopped the car to_take(take) a short break as I was feeling tired.

　　④(2013·重庆高考改编)The engine just won't start. Something seems to_have_gone (go) wrong with it.

　　二、动词不定式的语态

　　1．主动语态和被动语态

　　(1)动词不定式有主动语态和被动语态两种形式；

　　(2)在主动语态中动词不定式与其逻辑主语构成主动关系；

　　(3)在被动语态中动词不定式与其逻辑主语构成被动关系；有一般时to be done和完成时to have been done两种形式。

　　We were very excited to hear the news.

　　听到那则消息，我们很兴奋。

　　It's a great honour for me to be invited.

　　能被邀请，甚是荣幸。(me是invite动作的承受者)

　　No harm seems to have been done.

　　似乎并没有什么危害发生。(harm是do的承受者；且发生在seem前)

　　2．动词不定式的主动形式表示被动意义

　　(1)动词不定式作定语与被修饰词构成动宾关系，同时与句中另一名词或代词有逻辑上的主谓关系时。

　　We have masses of work to do today.Hurry up!

　　今天，我们有很多工作要做。快点儿！

(2)在"be ＋性质形容词＋动词不定式"结构中。