advice 是名词,而 advise 是动词,但它们的意思是基本相同的。用作动词的 advise 后接另一个动词时,后面的动词要用动名词,而不能用不定式。我的疑问是:如果用名词 advice 作主语,那它后面用动词作表语时,则这个表语也是要用动名词吗。如:My advice is being careful.
如果用名词 advice (意为“建议”)作主语,那它后面用动词作表语时,则这个表语要用动词不定式。如:My advice is to be careful. 又如:
My advice to you, sir, is to speak the truth. (张道真主编:《现代英语用法词典》修订版p.27)