Question

Open the brackets to make the sentences complete. Use the future perfect tenseпомогите плиииз 1.By half past eight they (not,have) supper yet. 2.The birds (fly) away before winter comes. 3.In five years' time we (finish) school. 4.By this time next week Jack (take) his exam. 5.I hope it (stop) raining before we have to go. 6.I don't think my parents (byu) a computer by the end of the week. 7.George (not,memorize) al the idioms by Friday. 8.The Rogers (finish) building their new cottage before summer. 9.The party (not,start) before we get there. 10.He (not,come) back by supper time.

Answer 1

1.By half past eight they (will not have had) supper yet.
2.The birds (will have flown) away before winter comes.
3.In five years' time we (will  have finished) school.
4.By this time next week Jack (will have taken) his exam.
5.I hope it (will have stopped) raining before we have to go.
6.I don't think my parents (will have bought) a computer by the end of the week.
7.George (will not have memorized) al the idioms by Friday.
8.The Rogers (finish) building their new cottage before summer.
9.The party (will not have started) before we get there.
10.He (will not have come) back by supper time.

Answer 2

1. By half past eight they will not have had supper yet. 2. The birds will have flown away before winter comes. 3. In five years' time we will have finished school. 4. By this time next week, Jack will have taken his exam. 5. I hope it will have stopped raining before we have to go. 6. I don't think my parents will have bought a computer by the end of the week. 7. George will not have memorized all the idioms by Friday. 8. The Rogers will have finished building their new cottage before summer. 9. The party will not have started before we get there. 10. He will not have come back by supper time.

Answer 3

Sure! Here are the complete sentences with the brackets filled using the future perfect tense:

1. By half past eight they will not have had supper yet. 2. The birds will have flown away before winter comes. 3. In five years' time, we will have finished school. 4. By this time next week, Jack will have taken his exam. 5. I hope it will have stopped raining before we have to go. 6. I don't think my parents will have bought a computer by the end of the week. 7. George will not have memorized all the idioms by Friday. 8. The Rogers will have finished building their new cottage before summer. 9. The party will not have started before we get there. 10. He will not have come back by supper time.

Please note that in the future perfect tense, we use "will have" followed by the past participle form of the verb. This tense is used to express an action that will be completed before a specific future time or event.