1
be a letdown
letdown 是可数名词，常用单数，前面常加 a/an。
The sequel was a letdown after the first film.
继第一部之后，续集令人失望。
失望；沮丧
先理解核心含义，再看它在真实句子里的用法。
失望；沮丧
letdown
The sequel was a letdown after the first film.
继第一部之后，续集令人失望。
减低；减退
n a feeling of dissatisfaction that results when your expectations are not realized
After all the hype, the movie was a real letdown.
在所有的宣传炒作之后，这部电影真让人失望。
The team's loss in the final game was a huge letdown for their fans.
球队在决赛中的失利让球迷们大失所望。
Getting a plain envelope instead of a package was a letdown.
收到一个普通信封而不是包裹，真是让人失望。
letdown 是可数名词，常用单数，前面常加 a/an。
The sequel was a letdown after the first film.
继第一部之后，续集令人失望。
用 for 引出感到失望的对象。
The cancellation was a letdown for the fans.
取消让粉丝们大失所望。
find + 宾语 + 名词补足语，表示“觉得……是……”。
I found the ending a letdown.
我觉得结局令人失望。
Not this
He letdown his friends.
Use this
He let down his friends.
letdown 是名词，不能作谓语动词；表示“使某人失望”要用动词短语 let down，两个词分开写。
Not this
The ending was letdown.
Use this
The ending was a letdown.
letdown 是名词，不能像形容词一样直接作表语；单数可数名词作表语需加冠词，所以应该是 was a letdown。
Not this
It was a let down.
Use this
It was a letdown.
名词 letdown 是合成词，必须连写；let down 是动词短语，分开写时不能作名词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
很大的失望
The ending of the movie was a big letdown.
这部电影的结局让人大失所望。
真让人失望
After all that hype, the concert was a real letdown.
在那么多宣传之后，这场音乐会真让人失望。
有点让人失望
The food was good, but the service was a bit of a letdown.
食物不错，但服务有点让人失望。
太让人失望了
It was such a letdown that the match was cancelled.
比赛取消真是太让人失望了。
令人感到失望
The final episode came as a letdown to many viewers.
最后一集让许多观众感到失望。
令人大失所望的事
The finale was a real letdown.
结局令人大失所望。
有点令人失望
The museum was a bit of a letdown.
那个博物馆有点令人失望。
极大的失望
The new album was a huge letdown for fans.
新专辑让歌迷们极为失望。
Use letdown naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
let + down：期望被“放下来”落空，就是失望。
语域：informal 常见场景：日常对话、非正式写作 作“失望”讲时通常用于口语或非正式场合，比较口语化，正式书面语中较少使用。
All listed words end in the same /daʊn/ sound as letdown and share the spelling chunk “down.” Beware of the lookalike “laden” (/ˈleɪdən/), which visually resembles “letdown” but has a different vowel and final consonant.
Dictionary facts from ECDICT, WIKTIONARY.