Future Perfect & Future Perfect Progressive/Continuous

Future Perfect в основном используется, когда говорится о действии, которое закончится в будущем к определенному моменту времени. Например: Я отремонтирую машину к среде.- I`ll have fixed the car by Wednesday.
Она прочтет мою книгу к следующей неделе.- She`ll have read my book by next week...

Future Perfect Progressive/Continuous в основном используется при переводе однотипных русских предложений:
В сентябре будет 2 года, как я работаю здесь (дословно: к сентябрю я проработаю здесь 2 года). – By September I`ll have been working here for 2 years.
На следующей неделе будет полгода, как я учусь здесь. - By next week I`ll have been studying here for half a year.

Пара текстов, иллюстрирующих использование этих двух времен (Changing times, changing tenses; PATRICIA WILCOX PETERSON)
1) Today at 7:30 a.m., 840 runners began their marathon race around the city. Most of them will stay in the race to the end. The prize is money—enough money to pay for a trip to another race!
Now it's ten o'clock, and the winner has just crossed the finish line. His time was two hours, thirty minutes, and 25 seconds.
The man with the stopwatch is clocking the race. He'll have clocked a different finishing time every few minutes for two hours, when the last runner comes in.
The other runners are still racing. They'll finish the race at different times. Some will have run for three hours; some will have run for three and one-half hours; and some will have run for much longer.
When they finish, they'll be very tired. They'll have run half the time through city streets. The streets were closed to traffic, so they won't have run into any cars. The rest of the time they'll have run along the river.
Each runner will have used his own special method to keep going. The young boy counts the miles. He'll have counted one mile every seven minutes. The older man watches for friends. He'll have seen a number of people finish before him, but he doesn't care. He'll have run every marathon race for thirty years when this race is over. He hasn't ever won any prizes for speed, but he'll have finished more races than any other runner. Today alone he'll have run twenty-six miles, the length of the marathon race.

2) This morning at five o'clock, the Green Mountain Restaurant caught on fire. Nobody noticed the fire until six o'clock, when the house next door started to burn. Firefighters came from all over the area. They began to fight the fire at seven o'clock. Now it's eight o'clock, and the fire is still going strong. The firefighters are working hard, but they haven't brought the blaze under control yet. Every few minutes they call for more help.
Fire Chief Brown says that in another hour they'll have put out the fire in the house. At that time, the house will have been burning for three hours. Half the house will be gone. Chief Brown is afraid that the fire in the restaurant may go on until ten o'clock. Before it's out, the restaurant will have been blazing for five hours. Every few minutes, part of the building falls in.
Firefighters will have been fighting the fire in the restaurant for three hours. They'll have been pumping water out of Green Mountain Lake to put out the fire. They'll have been holding their hoses on the fire the whole time. However, the fire will have been burning too long. By the time the fire is under control, nothing will remain of the restaurant. The firefighters will have been working with all their strength, but it will have been too little and too late.

Упражнения на отработку:
a) http://unamsanantoniolab.com/eng/Fut_perfect/ex1.htm
b) http://www.englishpage.com/verbpage/verbs25.htm
c) http://www.englishpage.com/verbpage/verbs26.htm
d) http://www.englishpage.com/verbpage/verbs27.htm
e) http://www.englishpage.com/verbpage/verbs28.htm