这是什么味儿? 
What's that smell? *完全不清楚时。
What's that smell? (这是什么味儿?)
Oh, no! Something's burning. (噢，不好!是什么糊了吧。)
I wonder what that smell is?
I wonder where that smell is coming from? 
什么声音? 
What's that noise?
What's that noise? (什么声音?)
It's my alarm clock. (是我的闹钟的声音。) 
这是排什么的队? 
What is this line for?
What is this line for? (这是排什么的队?)
I have no idea. (我也不知道。)
Why are people lined up? (人们为什么排队?) 
打什么鬼主意呢?(你忙什么呢?) 
What are you up to? *up to “就某事有……企图”、“打……的坏主意”、“从事……”。
What are you up to tonight? (你今天晚上忙什么?)
Why should I tell you? (我干吗非得告诉你不可?)
What's going on? (是什么呀?) 
我可以问一个问题吗? 
May I ask you a question?
May I ask you a question? (我可以问一个问题吗?)
Sure, what is it? (当然，什么问题?) 
“drowsy”是什么意思? 
What does “drowsy” mean?
What does “drowsy” mean? (“drowsy”是什么意思?)
It means “sleepy.” (“drowsy”表示“犯困”。)
这是什么? 
What's this?
What's this? (这是什么?)
It's a foldable bed. (这是折叠床。) 
那是什么?
What's that? 
这是谁的? 
Who does this belong to?
Whose is this?
To whom does this belong? 
哪一个? 
Which one?
That's my car. (那是我的车。)
Which one? (哪辆?) 
这叫什么? 
What's it called?
What's it called? (这叫什么?)
It's called tempura. (这叫“天麸罗”。)
What do you call it? 
这是什么礼物? 
What did you get for me? *这种说法不只限于送礼物时。还有“你给我买什么了?”、“你给我带什么来了?”等的语感。
What did you get for me? (是什么礼物?)
I got you a doll. (我给你买了一个娃娃。) 
去哪儿呀? 
Where are you headed? *比较随便的口语说法。
Where are you headed? (去哪儿?)
Home. (回家。)
Where are you going?
Where are you off to? 
比如说? 
For example?
For instance? 
隔多长时间? 
How often? *“隔几分钟来一趟车”或者“隔多长时间打一次网球”等用于询问时间的间隔时。
How often should I take this medicine? (这药一天吃几次?)
Five times a day. (一天5次。)
How frequently? 
U.S.A.是什么的缩写? 
What does USA stand for?
What does USA stand for? (U.S.A.是什么的缩写?)
It stands for the United States of America. (它是United States of America的缩写。) 
多长? 
How long? *询问距离、尺寸时间的长短，听到这样的提问，对方以具体数字回答。
How long have you dated her? (你和她交往了多长时间?)
About four years. (大概4年吧。)
How long is her hair? (她的头发有多长?)
Very long. (很长。)*不能用具体数字回答时，也可以用类似very long这样的话来回答。 
多早? 
How early?
How early should we leave? (咱们多早出发合适?)
Let's leave at 7∶30 am. (早晨7∶30吧。)*用How表示问“多……”的说法还有以下几种。
How short? (多短?)
How fast? (多快?)
How far? (多远?)
How quickly? (多快的速度?)
How slowly? (［速度、动作］多慢?)
How soon? (［时间/期间］多快?)
How late? (［时间/时刻］多晚?)
How much? (［不可数］多少?)
How many? (［可数］多少?)
How big/large? (多大?)
How small/little? (多小?) 
暑假什么时候开始? 
When does summer break start?
When does summer break start? (暑假什么时候开始?)
On July 25th. (7月25号。) 
开学典礼是哪天? 
When was the opening ceremony?
When was the opening ceremony? (开学典礼是哪天?)
January 8th. (1月8日。) 
你知道这个生词的意思吗? 
Do you know the meaning of this word? 
这个词怎么发音? 
How do you pronounce this word?
How do you pronounce this word? (这个词怎么发音?)
Climb. The “b” is silent.
A和B之间有什么区别? 
What's the difference between A and B?
What's the difference between A and B? (A和B之间有什么区别?)
They're about the same. (它们几乎相同。)