vt.证明；保证；证实；颁发证书

I certify that this is a true copy. 我证明这是真副本。

I certify that he has received your money. 我证明他已经收到了你的钱。

Can you certify for his ability as a teacher? 你可以保证他能胜任老师的工作吗?

I certify on my honour that he is innocent. 我用人格担保他是清白无辜的。

I certify the above information is true and accurate. 本人证实上述资讯是真实和正确的。

certify的基本意思是“证明”,指以盖章或签字的手段正式证实某事的真实性，引申可表示“发证书给…”。

certify在英式英语中表示“正式宣布某人有精神病”,是非正式用语。

certify是及物动词,接名词、代词作宾语,也可接that从句。certify还可接以“as/to be+ n./adj. ”充当补足语的复合宾语。