testify for / against

にほんブログ村 英語ブログ 英単語・英熟語へ

Testify for: to present evidence or testimony in favor or defense of someone or something as a witness in a trial.

The doctor was asked to testify for the plaintiff in the criminal negligence lawsuit against the construction company.  

 

Testify against: to present evidence or testimony against someone or something as a witness in a trial.

I refused to testify against the mob boss unless the police were able to guarantee the safety of my family.