He raised his arm to ask a question.

他举起手臂问了一个问题。

He approached her to ask a question.

他接近了她，想要问个问题。

He raised his hand to ask a question.

他举起手提问。

He raises his hand to ask a question.

他举手提出一个问题。

He raised his hands to ask a question.

他举起手提问。

She raised her hand to ask a question.

她提高了手来提问。

She interrupted the meeting to ask a question.

她在会议中途插口，提出了一个问题。

If you have any doubts, feel free to ask a question.

如果你有疑问，请随时提问。

She didn't want to ask a question and risk looking dumber.

她不想问问题，怕显得更愚蠢。

For example, Americans usually use the helping verb do when they ask a question.

例如，美国人在提问时通常使用助动词do。