Now I couldn't do it any more.

现在我不能再做这件事了。

youdao

At least I couldn't do it.

至少我不能做这件事。

youdao

Because I couldn't do it.

因为我做不到。

youdao

They never said you can't do it because you're a woman, so it never occurred to me that I couldn't do it" But she says things are starting to look better for women composers.

VOA: special.2010.07.12

I couldn't do it.

但我不行。

美国的出版市场 - SpeakingMax英语口语达人

I know you couldn't do the details, but you should at least know that it's i prime and j prime that have been replaced by i and j.

我知道你们不太注意细节,但你们至少应该知道 i' 和 j',已经被 i 和 j 取代了

耶鲁公开课 - 基础物理课程节选

"I woke up and knew how I had felt about the previous one and knew I couldn't do it, " she said.

BBC: Vicky Pryce trial: 'I felt ashamed and upset'

"I was offered a role a year last August, but I couldn't do it because of preparations for Johnny English, " he said.

BBC: Rowan Atkinson plans stage return

How would I feel then if people who were totally unconnected with me told me that I couldn't do it, or that they would prosecute whoever helped me?

BBC: The right to die: Should euthanasia be made legal?