过去完成时汉译英，及疑问句肯否定回答否。
最佳答案：I had had dinner before my mum came back homeHe had read lots of books before he
用过去完成时造句 我昨天打篮球了 然后变疑问句,否定句,肯否定回答
最佳答案：题目错了。过去完成时只能用于过去的过去比如I had finished my homework before i had dinner.我昨天打篮球了 句中有昨
“过去完成时”句子结构肯定句、否定句、疑问句和疑问句回答、特殊疑问句。
最佳答案：had/hadn't done