英 /bɪˈliːv/，美 /bɪˈliːv/
认为：If you believe that something is true, you think it is true, but you are not sure.（正式）
相信：If you believe someone or if you believe what they say or write, you accept that they are telling the truth.
相信…的存在：If you believe in fairies, ghosts, or miracles, you are sure that they exist or happen. If you believe in a god, you are sure of the existence of that god.
赞成：If you believe in a way of life or an idea, you are in favour of it because you think it is good or right.
对…有信心：If you believe in someone or what they are doing, you have confidence in them and think that they will be successful.
表示“相信某事”。
例：I believe that he is telling the truth.（我相信他在说真话。）
表示“认为某人/某事是……”。
例：I believe him to be honest.（我认为他很诚实。）
例：I believe she has already left.（我认为她已经离开了。）
表示“相信某物或某种理念”“相信某事物的存在或价值”，常用于抽象概念。
例：I believe in God.（我相信上帝。）
例：She believes in hard work.（她相信努力工作。）
例：I believe in the power of love.（我相信爱的力量。）
固定表达，意思是“信不信由你”，用来引出令人惊讶的内容。
例：Believe it or not, he won the competition.（信不信由你，他赢了比赛。）
例：Believe it or not, he won the race.（信不信由你，他赢了比赛。）
believe in：信仰；信任
believe it or not：信不信由你
make believe：v. 假装；假扮；n. 假装；虚构
believe you me：[口语][用以加强语气]相信我的话，相信我说的是真的(或算数的)；真的
what you believe in：你相信什么
Experts believe that the coming drought will be extensive.（专家们认为即将到来的干旱将会是大面积的。）
He did not sound as if he believed her.（听起来他似乎不相信她的话。）
I don't believe in ghosts.（我不相信有鬼。）
He believed in marital fidelity.（他赞成对婚姻忠实。）
If you believe in yourself you can succeed.（对自己有信心，你就能成功。）
We believe in his ability.（我们相信他的才干。）