7-10. Обороты с причастиями настоящего времени

Все формы причастия настоящего времени получаются «обезличиванием» личных форм во всех временах – т.е. заменой личного глагола на -ing форму:

drive/drives → driving
am/is/are/was/were driven → being driven

am/is/are/was/were driving → being driving
am/is/are/was/were being driven → being being driven

have/has/had driven → having driven
have/has/had been driven → having been driven

(формы, которые получаются в продолженном времени, не употребляются, так как получается «масло масляное» - слишком много -ing)

We have sat here in the sun for two hours and are very thirsty. →
Having sat here in the sun for two hours, we are very thirsty.

Примеры сложных форм причастия:

Having slept for twelve hours, I felt marvellous. (perfect)
She loves being looked at. (passive)
Not knowing what to do, I went home. (negative)
She's angry about not having been invited. (negative perfect passive)