10.6.8 Read the theory and find examples of all the future tenses in the text in Ex. 1.
We use the future perfect (will have + past participle) to
describe an action that will be finished before a stated future
time. They will have finished making the roof garden before
the end of next week. (active voice) The apartment will have
been built by the end of the year. (passive voice)
Time expressions used with the future perfect: before,
by, by then, by the time, until/till (in negative sentences)
We use the future perfect continuous to emphasise the
duration of an action up to a certain time in the future. By next
month, James will have been working at the farm for five years.
Time expression often used with the future perfect
continuous: By ... for​

Future perfect (will have + past participle) is used to describe an action that will be finished before a stated future time. For example, in the sentence "They will have finished making the roof garden before the end of next week," the action of making the roof garden will be completed before the end of next week.

Another example is "The apartment will have been built by the end of the year." Here, the construction of the apartment will be completed before the year ends.

Time expressions often used with the future perfect are before, by, by then, by the time, and until/till (in negative sentences). These expressions help specify when the action will be completed.

Moving on to the future perfect continuous, it is used to emphasize the duration of an action up to a certain time in the future. For instance, "By next month, James will have been working at the farm for five years." This means that by the next month, James will have spent five years working at the farm.

The time expression often used with the future perfect continuous is "by... for." This expression indicates the length of time an action has been happening up to a future point.

It is important to understand that these future tenses are used to talk about actions that will be completed or continuing up to a certain future point. They help add clarity and precision to our understanding of when the actions will occur.