Future Perfect Tense (shall/will + have+p.p.)

 

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Future perfect tense uses in these situations behind:

(1) There will be two affairs happen in the future.  The earlier finish one uses future perfect tense, and the later one (the adverbial clause) should use ¡§Present tense¡¨ to show the future time.

 

Example:

1.     When you return from Europe next year, the bridge will have been built.

(The bridge will finish building before your returning from Europe.)

2.     I shall have finished this novel when he graduates this summer.

(I will finish this novel before his graduation.)

3.     I shall have graduated from college when you come back from the United States next summer.

(I will graduate from college before your coming back from U.S.A.)

 

Note: It must using ¡§Present tense¡¨ not ¡§Future tense¡¨ to mention the future time in those adverbial clauses.  That¡¦s why these three sentences can¡¦t write like below:

1.     When you will return from Europe next year, the bridge¡K

2.     I shall have finished this novel when he will graduate this summer.

3.     When you will come back from the United States next summer, I shall have graduated from college.

 

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(2) The future perfect tense is using to indicate something will stop happening or remain its movement in the future.

 

Example:

1.     I shall have accomplished my task by this time tomorrow.

(I won¡¦t finish my task until this time tomorrow.)

2.     By next month, I shall have lived here for five years.

(I won¡¦t live here for five years until next month.)

3.     She will have studied at that school for six years by the end of June.

(She won¡¦t study at that school for six years until the end of June.)

4.     The wooden bridge will have fs by next week.

(The wooden bridge won¡¦t last for four months until next week.)

 

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(3) The future perfect tense also can express the experiences happen in ¡§a point of future time¡¨ or ¡§before a movement happens¡¨.

 

Example:

1.     I shall have read this book for four times if I read it again.

(If I read it again, it will be the fourth time.)

2.     She will have been here for five times if she comes again this summer.

(It will be the fifth times if she comes this summer.)


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