1. Correct the errors if necessary. 1. Since when are they waiting for us? 2. I have been looking for my passport since I came home. 3. His friends have been having this building for ten years. 4. In recent years, scientists are developing many new machines.

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Сергей Масленников

Английский язык

27 апреля, 08:28

1. Correct the errors if necessary. 1. Since when are they waiting for us? 2. I have been looking for my passport since I came home. 3. His friends have been having this building for ten years. 4. In recent years, scientists are developing many new machines.

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Александр Крюков · Answer 1

1. Since when have they been waiting for us? 2. I have been looking for my passport since I came home. 3. His friends have had this building for ten years. 4. In recent years, scientists have developed many new machines.

Пояснение: Предлоги for и since употребляются в большинстве случаев с временами Present Perfect и Present Perfect Continuous.