He had phoned me several times by yesterday morning.
到昨天早上，他已经给我打了好几个电话了。
The letter was written by him yesterday morning.
昨天上午他写了这封信。
He had finished writing the book by eleven yesterday morning.
昨天上午十一点以前，他写完了这本书。
I heard that Los Angeles was hit by a severe earthquake yesterday morning.
我听说洛杉矶昨天早晨遭到了一次强烈地震的袭击。
By 5:00 yesterday morning we had done that work.
到昨天早上5点钟时，咱们已做完了那件工作。
I heard that Los was hit by a severe earthquake yesterday morning.
我听说洛杉矶昨天早晨遭到了一次强地震的袭击。
By 5:00 yesterday morning we had done that work.
到昨天早上5点钟时，我们已经做完了那件工作。
By 5:00 yesterday morning we had done that work.
到昨天早上5点钟时，我们已经做完了那件工作。
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