to not succeed at something
If you don't study, you might fail the test.
如果你不學習,你可能會考試不及格。
to not pass a test or exam
You will fail if you don't answer the questions correctly.
如果你不正確地回答問題,你會不及格。
to not do something you should do
He never fails to say thank you.
他從來不會忘記說謝謝。
to stop working properly
The engine might fail if not maintained.
如果不維護,引擎可能會故障。
to become weak or less effective
His health began to fail as he grew older.
隨著年齡增長,他的健康開始衰退。
to disappoint someone or not help when needed
Don't fail your friends when they need you.
當朋友需要你時,不要讓他們失望。
to not be enough when needed
The crops will fail if there is no rain.
如果不下雨,莊稼會歉收。
to be unable to continue operating
Many small businesses fail in their first year.
許多小企業在第一年就倒閉了。
a result of not passing a test or exam
Getting a fail means you need to try again.
得到不及格意味著你需要再試一次。
a mistake or lack of success
The project was a complete fail from the start.
這個項目從一開始就完全失敗了。