... www.tailieuduhoc.org This happened in 19 57, when I was still a baby. She has just come back from a holiday in Crete, where Alex and I went last year. Unit 94 Participle clauses Main points ... particular time, you use a time clause with `by the time' or `by which time'. By the time I went to bed, I was exhausted. He came back later, by which time they had gone. 7 ... the time clause and use a participle as the verb. I read the book before going to see the film. The car was stolen while parked in a London street. Unit 97 Purpose and reason clauses...