Future perfect simple: form
We usewill/shall + have +the-edform of the verb.
We useshallonly for future time reference withIandwe. Shallis more formal thanwill.
singular and plural | |||
+ | I, we she, he, it, you, they | (full form) willorshall will | have worked |
I, she, he, it, you, we, they | (short form) ’ll | ||
− | I, we she, he, it, you, they | (full form) will notorshall not will not | have worked |
I, we she, he, it, you, they | (short form) won’torshan’t won’t | ||
? +Will ?−Won’t | I, she, he, it,you, we, they | have worked? |
Note:Shall I, shall weandshan’t I, shan’t wein future perfect questions are rare.
Future perfect simple: use
Events finished by a certain time in the future
We use the future perfect form when we look back to the past from a point in the future. We usually use a time phrase, for exampleby tomorrow, for three years:
Do you think she’ll have seenthe doctor by four o’clock?
Next month my parentswill have beentogether for thirty years.
At the end of this month, theywill have beenin their house for one year.
Next month Iwill have workedfor the company for six years.
I think they’ll have gotthere by six o’clock.
Won’tshehave retiredby the end of the year?(more common thanWill she not have retired?)