Unless your friend (to have) an invitation, he (not to be able to) go to the party.
She (to be) late for the lesson if she (not to) leave earlier.
If you (to be) angry, they (not to) let you in the house.
He (not to) open the book unless he (to know)what tasks to do.
We (to have to) stay home if the weather (to get) worse.
Unless you (to be)more careful with the knife, you (to cut) yourself.
If I (to tell) you a secret, you / to promiseto keep it?
If my mother (not to have to) work next weekend, we (to be able to)go to the funfair.
1. Тhе given explanation was not complete. - Предоставленное объяснение было неполным. - given - Причастие второе - определение.
2. The voices coming through the open window were very loud. - Доносящиеся через открытое окно голоса были очень горомкими - coming - причастие первое - определение
3. When burnt coal produces heat. - При сжигании угля выделяется тепло - burnt - причастие второе - обстоятельство
4. When writing a telegram we must use as few words as possible. - Сочиняя телеграмму, надо использовать минимум слов - writing - причастие первое - обстоятельство