vt. & vi.为…作证，证明 serve as evidence of; bear witness to; give evidence of

　～ abundantly　充分地证明
　～ emphatically　着重证明
　～ falsely　为…作伪证
　～ flatteringly　讨好地证明
　～ personally　个人地证明
　～ sincerely　为…真诚地作证
　～ solemnly　郑重地证明
　～ against　作对…不利的证人〔词〕
　～ before　出庭作证
　～ for　为…作证
　～ on behalf of sb　为某人作证
　～ to　证明…

　The witnesses testify in the law court.　证人在法庭上作证。
　One witness testified that he'd seen the robbery.　有一个证人作证说他看见了这次抢劫。
　The witness testified that the larger car crowded the smaller one into the ditch.　这个现场目击者作证说是那辆大车把小车挤到沟里的。
　He testified that the defendant was innocent.　他作证说这个被告是无辜的。

 ♣ testify against　(v.+prep.)
　作对…不利的证人〔词〕　be a witness, usually in court; prove the guilt of (sb)
　None of the victims would appear in court to testify against him.　受害者中无人愿意出庭作指控他的证人。
　He hated to testify against a friend.　他不愿出庭作对朋友不利的证词。
 ♣ testify for　(v.+prep.)
　证明某人无罪　be a witness, usually in the court, in favour of (sb)
　Only members of his family have testified for him.　只有他的家人证明他无罪。
 ♣ testify in favor of　(v.+prep.+n.+prep.)
　作对…有利的证词/cn>　give evidence in favor of sb in a court of law

▲ testify in favor of sb

　He will testify in favor of the defendant.　他愿意出庭作对被告有利的证词。
　He offered to testify in favor of the accused.　他主动出庭作对被告有利的证词。
 ♣ testify to　(v.+prep.)
　为…作证，证明　bear witness to
　〔说明〕 testify to常不用于进行体。

▲ testify to sth

　I can testify to his honesty.　我可以为他的诚实作证。
　I can testify to this man's veracity and good character.　我可以作证，此人诚实可靠，品德良好。
　I can testify to his innocence.　我可以证明他无罪。
　The teacher testified to the pupil's ability.　老师证实了学生的能力。
　Her tears testified to her grief.　她的眼泪证明了她的悲伤。

 ♣ testify, prove
　这组词都有“证明”的意思。其区别是：
1. testify是指证明某事的真实性；prove是指证明某人或某物具有的某种品质特性。
2. testify指通过某人证明；prove指通过事实证明。
3. testify用于法庭或其他正式场合，比较郑重。
4. 用作及物动词时， testify后可接从句作简单宾语；prove后可接复合宾语。用作不及物动词时， testify后常接against, for〔on〕 behalf of或to等词。

　下面两句意思相同：