Найдите Participle I и Participle II и установите функции каждого из них, т.е. укажите, является ли оно определением, обстоятельством или частью глагола-сказуемого 1. Nylon was the first synthetic fibre used in clothing.
2. The atoms forming our planet are built of negative electrons, positive protons and ordinary neutrons.
3. This kind of treatment when used makes the metals heatresistant.
4. When passing through an electroscope, X-rays cause its discharge.
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Пример:
When heated to the boiling point water evaporates.
(When) heated - Participle II, обстоятельство