sentence是审判指”已审为有罪的吗”？

convict是定罪
sentence是量刑，即在定罪的前提下确定给予什么样的惩罚

convict
He was convicted 3 years in prison.

sentence 只有宣判的意思，是不是有罪不一定
法官已经定了犯人的罪
The judge has declared him guilty. （没有定罪的不能叫犯人，只有宣判以后才能叫犯人，中文不严谨）

sentence 只有"宣判,判决,判刑"的意思
法官已经定了犯人的罪
The judge had the prison sentenced.

convict 定（某种）罪 sentence/condemn 判决……

She has twice been convicted (of fraud).她被定（为诈骗）罪。
You can't convict a man of a crime on circumstantial evidence alone. 不能只靠旁证就判定一个人有罪.

sentence/condemn 判决
~sb. to sth. 判决; 宣判

Eg.sentence a thief to six months' imprisonment