〔8〕 過去完了形
(1)He didn’t come to the party because he had forgotten about it.
(2)She didn’t recognize me because we had not met before.
(3)He understood the procedure because he had done it many times.
(4)It was not surprising because she had always been a brilliant student.
(5)By the time she turned 20, she had lived in three different countries.
(6)They had known each other for a decade before they got married.
(7)She was able to make the recipe because she had taken a cooking class.
(8)The road was slippery because it had rained.