Раскройие скобки употребивглаголы в нужном времени. he ... by the time I got there (leave). she ... as a clerk for 10 years before she resigned (work)

1). He had left by the time I got there.

Complex Sentence. The first part is Past Perfect. This action happened before the other one, which is expressed in the second part. The marker of this tense is "by the time". Had + Participle 2.

2). She had worked as a clerk for 10 years before she resigned.

See above. The marker is "before".