be sentenced to do是正確的。
be sentenced to表示被宣判，此位置的to是不定式，所以後面用do。
關鍵詞匯：sentenced
音標：英[?sent?nst] 美[?sent?nst]
詳細釋義：
v. 判決; 宣判; 判刑;
[詞典] sentence的過去分詞和過去式;
短語搭配：
the death sentence?死刑
to sentence sb to 5 years?判處某人入獄五年
例句：
The judge sentenced him to do hard labour.
法官宣判他服苦役。
He will be?sentenced?later today.?
今天晚些時候將宣布對他的判決。
The criminal had been sentenced.
罪犯已被判了徒刑。