他问有没有人看到过他的钥匙。
He asked if anyone had seen his keys.
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asked英 /ɑːskt/|美 /æskt/
had英 /hæd/|美 /hæd/
解释
主句 asked 为一般过去时，if 引入一般疑问转述；从句 had seen 用过去完成时表达在问之前发生的事件。
He asked if anyone had seen his keys.
主句 asked 为一般过去时，if 引入一般疑问转述；从句 had seen 用过去完成时表达在问之前发生的事件。