He's never lost a book before(改反意疑问句) He's never lost a book before,___ ___ ?帮帮忙、谢啦

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He's never lost a book before(改反意疑问句) He's never lost a book before,___ ___ ?
帮帮忙、谢啦

has he;前面的never已经是否定了,后面用肯定.

has he