不定式的完成式概念：
不定式的完成式主要表示已經(jīng)完成的動(dòng)作—既可能是表示先于謂語動(dòng)作已經(jīng)完成，也可能是先于某個(gè)特定時(shí)間已經(jīng)完成。
如：I am sorry to have kept you waiting. (=I am sorry that I have kept you waiting) 對(duì)不起，讓你久等了。
不定式的完成式（to have+過去分詞）的用法：
1、表示在主句謂語的動(dòng)作之前發(fā)生的事情：
如：I'm glad to have met your parents here. 我很高興在這兒見到了你父母（已見過）
I'm sorry to have kept him waiting for me so long. 我很抱歉讓他等了我這樣久。（已經(jīng)等過了）
2、動(dòng)詞不定式的完成式和下列動(dòng)詞的過去時(shí)連用，表示過去沒有實(shí)現(xiàn)的事情：plan, hope, expect, be, intend, mean,w ish,等。注意一定是它們的過去時(shí)。另外還有should/wouldlike/love。這個(gè)結(jié)構(gòu)表示“本打算/想/計(jì)劃…”的意思。
例如：The game were to have taken place in Room. 比賽原計(jì)劃在羅馬舉行。
He planned to have gone abroad last week.=He planned to go abroad but he didn't. 他原計(jì)劃上周出國(guó)的。
I'd like to have been offered the job and(to have been)given the opportunity to prove myself. 我真想（當(dāng)時(shí)）把這個(gè)工作給了我，給我個(gè)機(jī)會(huì)讓我證明我自己。
同樣的意思也可用上述動(dòng)詞的過去完成時(shí)加動(dòng)詞不定式的一般式來表達(dá)。
例如：I had hoped to visit the great pyramid.
=I hoped to have visited the great pyramid.
=I hoped to visitit, but I didn't. 我本希望參觀大金字塔的。
They would have liked to have your help.
=They would like to have had your help.
=They wanted to have your help but they didn't have it. 他們本想得到你幫助的。
動(dòng)詞不定式時(shí)態(tài)知識(shí)體系：
不定式完成式的三點(diǎn)用法說明：
（1）表示發(fā)生在謂語動(dòng)作之前的動(dòng)作。
如：He seems to have caught a cold. 他似乎感冒了。
I hate to have quarreled with her. 我后悔和她吵架了。
I'm sorry to have given you so much trouble. 對(duì)不起給了你這么多麻煩。
�。�2）表示在某個(gè)給定的時(shí)間之前已完成的動(dòng)作。
如：I hope to have finished the work by now. 我希望現(xiàn)在以前已完成這項(xiàng)工作。
�。�3）表示過去未曾實(shí)現(xiàn)的想法和愿望。
如：I should like to have come earlier. 我本想早點(diǎn)來的。
We were to have been married last year. 我們本來打算去年結(jié)婚的。