1.uphold的基本意思是“支撑”,指维持直立使不倒塌,可用于已存在但受到攻击或挑衅的事物。引申可指支持意见、维护原则等。
2.uphold既可用作及物动词,也可用作不及物动词。用作及物动词时,可接名词或代词作宾语。可用于被动结构。
3.uphold可接介词in表示“支持”。
4.uphold的过去式和过去分词均为upheld。

uphold in(v.+prep.)
支持 support sb
▲uphold sb in sth
His family uphold him in his present action.他的家人支持他目前的行动。
The whole nation upheld the government in its policy of reform.全国上下支持政府的改革政策。

用作及物动词
▲S+～+n./pron.
Stout columns uphold the roof.牢固的柱子支撑着屋顶。
I cannot uphold such conduct.我不能赞成这种行为。
The principal upheld the teacher's decision.校长肯定了老师的决定。
They upheld our opinions.他们支持我们的意见。
The Supreme Court is expected to uphold the death sentence.预计最高法院将维持死刑的原判。
We will loyally uphold the principles of the United Nations.我们将忠实地维护联合国的原则。
Your praise and sympathy has upheld me greatly.你的称赞和同情给我很大的鼓励。
◇ 用于be ～ed 结构
The building's heavy roof was upheld by four columns.建筑物沉重的屋顶靠四根柱子支撑着。
His conviction was upheld on appeal.根据上诉维持对他的原判。

uphold, advocate, support
参见support条。
uphold, hold up
参见hold条。