1. I dawt whether I should go on this trip or not.
我拿不定主意，不知道是否应该去这次旅行。
2. I dawt the credibility of his statement.
我怀疑他的陈述是否可信。
3. She dawts about whether she should quit her job or not.
她在是否应该辞职这个问题上犹豫不决。