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- How had it happened? who had killed the convicts? Was it Ayrton? No, for amoment before he was dreading their return. 事情是怎么发生的？是谁杀死罪犯的呢？是艾尔通吗？不，刚才他还担心罪犯们会回来呢！
- When had it happened previously? 以前在什么时候发生过?
- We all go through dry spells. how has it been? siz months? 我们都有过干旱期。多久了？6个月？
- It happened even as he had expected. 事情正如他所料的那样发生了。
- The police asked me to describe exactly how it happened. 警察让我描述一下这事是怎样发生的。
- What is the tilt test and how has it been adapted for use in patients with vasovagal syncope? 何为倾斜试验？该试验是如何用于血管迷走神经性晕厥患者的？
- How does it happen that you know him? 你怎么会认识他的?
- How can it happen that so many machine parts get rusty? 怎么竟会有这么多机器零件生锈呢？
- How did it happen that they had drawn nothing form her? 怎么回事，他们从她口里什么话也没有套出来?
- It happened prior to my arrival. 这发生在我到达之前。
- How did it happen that the proposal was vetoed at the Security Council? 这项提案在安理会遭到否决是怎么搞的？
- I have it in mind to ask her advice when I see her. 我打算见到她时徵求她的意见。
- What is the tilt test and how has it been adapted for use in patients with asoagal syncope? 何为倾斜试验?该试验是如何用于血管迷走神经性晕厥患者的?
- How have you been lately, my lad? 近来好吗,老弟?
- It happened that my mother was out that day. 我母亲恰巧那天出去了。
- I realized I had had it in my pocket all along. 我发觉原来这一直就在我口袋里。
- What is the size of the Arab population in China and how has it changed over the years? 中国的阿拉伯人口有多少？这一数字这些年有变化吗？
- God, I have had it with this job! 天啊！这种工作我真受够了！
- How has productivity growth been attained and how has it contributed to the economy? 生产力成长是怎麽达到的?而生产力成长对经济又有什麽贡献?
- It happened in the year of grace88. 这件事发生在公元88年。
