дополните предложения используяfuture perfect continuous 1.By the beginning of the year

Дополните предложения используяfuture perfect continuous
1.By the beginning of the year l .....for three months.
2.By the end of July l..... for two years.
3.By afternoon we.... for two hours.
4. By 5o'clock he .... for twenty minutes
5.By the 1st of September.... for half a year.