387　insist on，stick to，keep on，persist in和persevere

① insist on sth./doing sth.意为“坚持要干某事”。

He insisted on writing the book. 他坚持要写这本书。

He insisted on his own opinions. 他坚持自己的意见。

② keep up doing sth.意为“把……继续下去，不松懈”，也可以说keep sth. up。

Since you have been doing the research work for five years，you should keep it up. 既然你从事这项研究工作已有5年了，你就应该把它继续进行下去。

③ stick to的意思同insist on和persist in差不多，较口语化，是对“原则，决定，愿望，意见，诺言，理想，理论”等的坚持，to为介词，后接名词或动名词，不接不定式。

He sticks to the principle through sick and thin. 他在任何情况下都坚持原则。

We stick to what is right. 我们坚持正确的东西。

④ keep on表示continue to do，指克服困难、顽强奋斗，也指一般的“老是”做某事。keep on后常接动名词作宾语，也可单独使用。

Keep on practising and you will speak English fluently. 坚持多练，你英语就能说得流利。

Don't keep on asking silly questions. 不要老是问愚蠢的问题。

The rain kept on several days. 雨一连下了好几天。

⑤ persist表示不顾困难或障碍，坚持某种活动；有时含贬义，表示固执，不听劝告，结构为：persist in sth./doing sth.。

He persisted in his foolish ideas. 他坚持其愚蠢的想法。

She persists in wearing the old-fashioned hat. 她坚持要戴那顶旧式的帽子。

If you persist in breaking the law，you will go to prison. 如果你坚持违法犯罪活动，你就得蹲班房。

⑥ persevere表示“坚持不懈，不屈不挠，坚忍不拔”，指不顾困难，始终如一地坚持，常含褒义，结构为：persevere in/at/with sth.，persevere with sb.。

He persevered in/at/with his studies amidst all these difficulties. 身处所有这些困难之中，他仍然坚持不懈地学习。

Although she was hopeless at chemistry，the teacher persevered with her. 虽然她的化学怎么教也不会，但老师仍然坚持教她。