The singer had never performed in New York before. 这位歌唱家以前从未在纽约演唱过. We had hardly started before [ when ] it began to rain. 我们刚出发,就开始下雨. He could not remember where he had seen her before. 他记不起在什么地方见过她了. It reminded me of the mistakes I had made before. 它使我想起了以前我犯的一些错误.
