未來完成式

型態

未來完成式是由兩個要素組成：
動詞 to have 的未來簡單式 (will have) + 主要動詞的過去分詞

主詞	+ will have	+ 主要動詞的過去分詞
He	will have	finished.
I	will have	finished.

未來完成式，以 to arrive 為例

肯定句	否定句	疑問句	否定疑問句
I will have arrived	I won't have arrived	Will I have arrived?	Won't I have arrived?
You will have arrived	You won't have arrived	Will you have arrived?	Won't you have arrived?
He will have arrived	He won't have arrived	Will he have arrived?	Won't he have arrived?
We will have arrived	We won't have arrived	Will we have arrived?	Won't we have arrived?
They will have arrived	They won't have arrived	Will they have arrived?	Won't they have arrived?

作用

未來完成進行式涉及未來未完成的動作。當使用這個時態時，我們對未來會有所期望，並且反觀在未來某時間會完成的動作。大部分常與時間詞一起使用。

舉例

I will have been here for six months on June 23rd.
By the time you read this I will have left.
You will have finished your report by this time next week.
Won't they have arrived by 5:00?
Will you have eaten when I pick you up?

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