do wonder

常见例句

Wang Shuai, 20, Qingdao: I do wonder if today`s actors have the knowledge to be able to deliver the lines properly.
王帅（音译），20岁，来自青岛：我很怀疑如今的小演员们有没有能力恰当地诠释经典。
I do wonder about the sensibility of the Chinese people (if there is such a word in Chinese) but was reassured to read some of the comments here.
我十分怀疑中国人是否意识到了这一点，但是在阅读评论后得到肯定的回答。
While the focus is on safety, and rightly so, I do wonder if there might be another benefit: inspiring more people to leave the car at home and take transit.
关注安全没错，但我好奇会不会带来另一个好处：促使更多人把车停在家里，乘坐公共交通工具。

Or you could say "I wonder if" and mean that you really do wonder,
或者你可以用“I wonder if”来表达你的确不是很清楚。
I wonder if 课堂 - SpeakingMax英语口语达人
I said that if I was really hygienic, and you can now wonder about how often do I shower?
但是这真的很棒，对不对？,那么为什么我要说这些呢？,我说过如果我真的很讲卫生的话？
麻省理工公开课 - 计算机科学及编程导论课程节选
Then you start to wonder well what is the system and ? what is it supposed to do?
于是你开始质疑,这个系统到底是什么,还有它到底是要干什么呢？
耶鲁公开课 - 金融市场课程节选

This notion is interesting but I do wonder whether we have time to even post a box!
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Although we have no doubt that Blu-ray movies will outsell HD DVD this week, we do wonder what the split will be.
ENGADGET: HD DVD and Blu-ray releases on February 12th, 2008 HD
All the best of luck to them of course but I do wonder whether that structural issue is going to limit their expansion ability.
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