Was heißt »anzweifeln« auf Englisch?

Das Verb »anzweifeln« lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Ich muss mich tausendmal bei dir dafür entschuldigen, dass ich dein Können angezweifelt habe!: I owe you a thousand apologies for having doubted your ability.

No doubt something unexpected happened.
No doubt something unexpected was happening.
There's no right answer to this question.
It's an important question.
"Has it worked yet?" asked Yuki. Mary just shook her head. The question was, of course, whether she was pregnant yet, because she wanted a child.
It was just a question.
There was no doubt that the moment had come for me to take the lead.
A question mark is missing from the end of the sentence.
Enthusiasm gradually gives way to doubt and uncertainty.
Enthusiasm is gradually giving way to doubt and uncertainty.
That's a trick question, isn't it?
Let me answer that question with a counter-question: Who cares?
Tom should know the answer to that question.
The boys and I looked at each other and asked ourselves a question no one is able to answer: How long is this going to last?
Many people seem to be interested in knowing the answer to that question.
I'll answer only one question.
He refused to answer that question.
I asked only one question.
I asked Tom that question.
Sorry, I missed that question.