had become是什么时态
回答
爱扬教育
2022-03-10
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扩展资料
做“有”的意思,可用于一般过去式,如I had a dog last year.去年我有一只狗。
用于过去完成式:如I had learned 500 words by the end of last week.到上周为 止我已学习了500个单词了。