F. The Future Perfect Tense

FORMATION

The Future Perfect Tense is formed by means of the Future Simple of the auxiliary verb to have and the Past Participle

of the main verb.

Table 12

USAGE

The Future Perfect Tense denotes an action viewed as comp­leted before a definite future moment indicated by an adverbial with the preposition 'by' or by another future action. It may also denote a future action covering a certain period of time up to or including the given future moment (with stative verbs, i. e. verbs not used in the Continuous aspect).

/ think she'll have finished the essay by Monday.

By the time you get back Mike will have left.

He'll have been in this business for five years by

next summer.

G. The Future Perfect Continuous (Progressive)

FORMATION

The Future Perfect Continuous (Progressive) tense is formed with the help of the Future Perfect Tense of the auxiliary verb to be and the Present Participle of the main verb.

Table 12

USAGE

The Future Perfect Continuous (Progressive) tense-form denotes an action lasting for a period of time up to or inclu­ding a certain future moment. This future moment can be indicated by an adverbial with the preposition 'by' or by another future action. As with all the perfect continuous tenses the Future Perfect Continuous is preferred to the Future Perfect when the speaker wants to emphasize the progressive character of an action.

By five o'clock I'll have been doing this crossword puzzle for two hours.

By the time he arrives in London Max will havebeen driving for nearly five hours.