my heart can't possibly break.①是因为can't是动词,所以后面的可能一词用副词?②can't possibly相当于impossible吗

my heart can't possibly break.①是因为can't是动词,所以后面的可能一词用副词?②can't possibly
相当于impossible吗

这里"可能"用副词由实义动词break决定,与cann't无关.
possibly与cann't(或couldn't等否定词)连用来加强语气,含"绝不"的意思.与impossible/impossibly还是有区别的.
翻译:我绝不会心碎!