不定式完成式用法歸納

不定式完成式的基本形式為to have done，其主要用法如下：

1. 表示比謂語更早的動作，即不定式所表示的動作發生謂語動作之前。如：

I remember to have seen him do it. 我記得曾看見他這樣做。

He is said to have written another TV play. 據說他又寫了一部電視劇。

I am ashamed to have mentioned it.我很慚愧提到了這件事。

2. 表示比某特定時間更早的動作，即表示在某個特定的時間之前已完成的動作。如：

I expect to have finished by tomorrow evening. 我看明天晚上之前可以完成。

We hope to have finished the job by next Saturday. 我們希望下周六前完成這項工作。

3. 表示假想的更早的動作，尤其是表示過去本來打算要做某事，但實際上沒有做成的動作。如：

They were to have left the next day. 他們本來決定第二天就離開的。

I should like to have been told the result earlier. 我本想讓人把結果早點告訴我。