insist on sb; 坚决主张，用虚拟语气。如.
When the son suggested that they should go to the park on Sunday, the expression on his father’s face suggested that he agreed with him，父亲用表情表示了默许。
They insisted that he （should）be present at the ceremony.
He insisted that he was innocent.=He insisted on his innocence.
坚持; 坚决认为(on, upon)
insist on a point
insist on being present
I insisted on his coming with us.
I insist that you (should) be present.
They insisted that she (should) be invitedinsist 用法与suggest 相似。insist作“坚持”说时，要用陈述语气；作“坚决主张