“it's a good idea”后面通常接动词不定式“to do sth.”,表示“做某事是个好主意”。例如,“It's a good idea to go for a walk after dinner.”(晚饭后散步是个好主意。)所以,你可以根据具体语境,在“it's a good idea”后面加上合适的动词不定式来表达你的想法或建议。
to do sth结构中,不定式的逻辑主语可以是人或物,也可以是引导词there;而 of... to do sth结构中,不定式的逻辑主语只能是人或物。例如: It is important for you to study hard. 努力学习对你很重要。 It is a good idea for the book to be given to her. 把这本书送给她是个好主意 。 It is a...