insist 后面什么时候接had done 什么时候接should do?

insist 用法与suggest 相似.
insist作“坚持”说时,要用陈述语气,正常时态
作“坚决主张；坚决要求”讲时,用虚拟语气(should+)do.
如：
They insisted that he （should）be present at the ceremony.他们坚决要求他出席这次典礼.
He insisted that he was innocent.=He insisted on his innocence.他坚持说自己是无辜的.
He insisted that he hadn't done this他坚称自己未做过这件事.
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