不定式是英語語法的一個(gè)重要的版塊，今天，小編為同學(xué)們準(zhǔn)備了相關(guān)的不定式語法體系下的不定式的完成體的使用規(guī)則，一起來看看吧！

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1) 如果不定式動(dòng)作是瞬間動(dòng)作動(dòng)詞，它表示一個(gè)在現(xiàn)在或過去某時(shí)之前已經(jīng)完成的動(dòng)作；如果是持續(xù)動(dòng)作動(dòng)詞，它表示一個(gè)一直持續(xù)到現(xiàn)在或過去某時(shí)的動(dòng)作。

a . 常見的可接不定式完成體的動(dòng)詞有：? happen / see / appear / prove / pretend / seem , etc .
He seemed to have lived a happy life .
他似乎一直過得很幸福。(他的幸福生活一直持續(xù)到現(xiàn)在)

b . 常見的可用于“主語+ be said + to have done / been”相當(dāng)于主動(dòng)句“People say + that”結(jié)構(gòu)的句型有：be said / reported / thought / supposed / expected / believed / considered / known 等。如：
Her husband is said to have given up smoking . 據(jù)說她丈夫已經(jīng)戒煙了。(“戒煙”發(fā)生在“據(jù)說”之前)
The girl is reported? to have been? a League member for five years .
據(jù)報(bào)道那姑娘入團(tuán)已經(jīng)5年了。(不定式表示謂語動(dòng)作前所處的狀態(tài))

c . 常見的可接不定式完成體的形容詞有 glad / happy / sad / disappointed / satisfied / sorry / surprised 等。如：
I'm sorry to have given you so much trouble . 對(duì)不起，給你帶來了那么多麻煩。
比較下面不定式的一般時(shí)和完成時(shí)的區(qū)別：
I'm happy? to have seen? you . 見到你很高興。(分手時(shí)說)
I'm happy to see you . 見到你很高興。(見面時(shí)說)
I'm sorry to keep you waiting for a minute . 對(duì)不起，要請(qǐng)你等會(huì)兒。(說話時(shí)還未等)
I'm sorry to have kept you waiting for a long time . 對(duì)不起，讓你久等了。(說話時(shí)已經(jīng)等了很久)

2) be + 不定式完成時(shí)態(tài)表示該做或想做但未做的動(dòng)作。如：
You were to have arrived?? there early that day . 那天你們應(yīng)該早點(diǎn)到那兒。(但你們晚到了)
I was to have helped?? him then . but I was too busy . 當(dāng)時(shí)我本想幫他的忙，可我太忙了。(未幫他的忙)

3) 表示“意圖，打算”之意的動(dòng)詞如 hope , wish , expect , think , suppose , want , plan , agree , mean , try 等用過去時(shí)，又后接不定式完成式作賓語時(shí)，表示想做而未做的事情。這種意義也可用這類詞的“過去完成時(shí)+不定式的一般式”表達(dá)。如：
We wished?? to have put out?? the fire in thirty minutes . (=We?? had wished to put…) 我們本打算半小時(shí)就把火撲滅的。(結(jié)果沒有)
The engineers planned to have removed the temple before the dam was completed . (= The engineers?? had planned to remove the…) 工程師們本決定大壩建成之前把那座寺廟移走的。(結(jié)果沒有)

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