Formación
Formación del tiempo future perfect con Will
Will have + past participle
Ejemplos:
You will have perfected your English by the time you come back from the U.S.- Will you have perfected your English by the time you come back from the U.S.?
- You will not have perfected your English by the time you come back from the U.S.
Formación del tiempo future perfect con Be Going To
Am / Is / Are + going to have + past participle
Ejemplos:
- You are going to have perfected your English by the time you come back from the U.S.
- Are you going to have perfected your English by the time you come back from the U.S.?
- You are not going to have perfected your English by the time you come back from the U.S.
Es posible utilizar Will o Be Going To para crear el Future Perfect con poca o ninguna diferencia en los significados.
Uso
Acción en el futuro antes de otra acción
El tiempo future perfect en inglés expresa la idea de que algo sucederá en el futuro antes de otra acción en el futuro. También puede expresar que algo sucederá antes de un momento determinado en el futuro.
Por ejemplo:
- By next November, I will have received my promotion.
- By the time he gets home, she is going to have cleaned the entire house.
- I am not going to have finished this test by 3 o'clock.
- Will she have learned enough Chinese to communicate before she moves to Beijing?
- Sam is probably going to have completed the proposal by the time he leaves this afternoon.
- By the time I finish this course, I will have taken ten tests.
- How many countries are you going to have visited by the time you turn 50?
Acción continua en el futuro antes de otra acción
Utilizamos el tiempo future perfect en inglés en combinación con Non-Continuous Verbs y algunos Mixed Verbs no continuos para expresar una acción futura que continuará hasta otra acción.
Por ejemplo:
- I will have been in London for six months by the time I leave.
- By Monday, Susan is going to have had my book for a week.
A veces las palabras live, work, teach y study se utilizan de las formas descritas anteriormente, aunque NO son Non-Continuous Verbs.
El future perfect no puede utilizarse en oraciones que comiencen con expresiones de tiempo, como when, while, before, after, by the time, as soon as, if, unless, etc. En su lugar, se utiliza el present perfect en estos casos.
Por ejemplo:
- I am going to see a movie when I will have finished my homework. Not Correct
- I am going to see a movie when I have finished my homework. Correct
Adverbios
- You will only have learned a few words.
- Will you only have learned a few words?
- You are only going to have learned a few words.
- Are you only going to have learned a few words?
Voz activa y pasiva
- They will have completed the project before the deadline. Active
- The project will have been completed before the deadline. Passive
- They are going to have completed the project before the deadline. Active
- The project is going to have been completed before the deadline. Passive
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