1
We insisted him to accept the gift.
We insisted that he should accept the gift.
We insisted that he accept the gift.
Use insist that + subject + should + infinitive: ‘We insisted that he should accept the gift.’
We can also leave out should and use the base form of the verb. This is the subjunctive: ‘We insisted that he accept the gift.’
Do not use person + to-infinitive after insist.
The same pattern is used after suggest, recommend, demand and request.
2
He insisted to pay for the taxi.
He insisted on paying for the taxi.
He insisted that he should pay for the taxi.
Use insist on + noun/-ing: ‘She insisted on a refund.’ ‘He insisted on paying for the taxi.’
Do not use insist + to-infinitive.