动词不定式完成式是英语语法中的一种时态形式，用于表示某个动作在另一个动作之前已经完成。下面是一些动词不定式完成式的例子：
-
“我很高兴地告诉你，我已经完成了我的作业。” I am happy to tell you that I have finished my homework.
-
“她期待着能够去旅行，但她必须先存够足够的钱。” She is looking forward to traveling, but she has to save enough money first.
-
“他原本想去看电影，但他决定先帮助他的朋友。” He was planning to go to the movie, but he decided to help his friend first.
-
“我想学习如何弹吉他，但我必须先买一把吉他。” I want to learn how to play the guitar, but I have to buy a guitar first.
-
“他们希望能够在明年完成这个项目。” They hope to finish this project by next year.
动词不定式完成式可以用在不同的句子中，例如陈述句、疑问句、感叹句等。使用这个时态形式可以清晰地表达出某个动作在另一个动作之前已经完成。希望这些例子能够帮助读者更好地理解和使用动词不定式完成式。
