1. Once out in the street, she walked quickly towards her usual bus stop. 一出来到大街上，她就很快地朝她平常等的汽车站走去。
Once out in the street 相当于 Once she was out in the street 引导时间状语从句。在从句主语与主句主语一致时，从句可省略主语。例如：
First aid, if (it is) properly done, can save a person’s life.
急救如果做得得法，能拯救人的性命。
I won’t go to the party unless (I am) invited.
除非邀请我，否则我不会参加这个聚会。
Once 可用作连词，意思为：一… 就，一旦。例如：
Once (it is ) printed, this dictionary will be very popular.
一旦出版，这本词典会非常畅销。
Once he arrives we can start.
他一到我们就可以动身。
Once可用作副词，意思为：一次；曾经。例如：
I have done it once.
我曾做过一次。
"Attention please, I'll repeat the question once more."
请注意我把问题再重复一遍。
She once knew him.
她以前认识他。
It once seemed inconceivable to everyone that men should travel to the moon.
"人们一度认为,人飞上月球似乎是不可想象的。

2. ‘Sorry, Miss,’ replied the man, ‘the truth is that the fogs too thick for the bus to run that far. “抱歉，小姐”，这男人回答道，事实上是雾太大了，车不能开那么远。
句中第一个that引导的是表语从句。例如：
The problem is that we have run out of money.
问题是我们钱已用完了。
The reason he did not come is that he was ill.
他没来的原因是他病了。
第二个that (或this) 在此处等于so，意思是“那么”（或“这么”），修饰形容词或副词。例如：
There did not seem much point in working on my PhD--- I did not expect to survive that long.
取得博士学位对我来讲没有什么意义，我不指望活那么久。
Can hard work change a person that much?
艰辛会使人变化那么大吗?
You see, a fog this bad is rare.
你听我说，这么糟糕的雾很少见。

3. While the rest of the passengers were getting out, she glanced at the faces around her.
当其他的乘客下车时，她瞥了一眼身边的人。
While意思是“当…的时候”，表示持续性的动作或状态，不能表示一时性或短暂性的动作。when表示某个具体的时间，所引导从句的动作或是与主句的动作同时发生，或是先于主句动作，可指一段时间，也可指一点时间，既可表示一时性的动作，又可表示持续的动作。例如：
While/ When the meeting was going on, he entered the room.
正当开会的时候，他走进了房间。（指一段时间，表持续的状态。）
When she comes, I shall tell her to wait for you.
她来的时候我会告诉她等你的。（指一点时间，表短暂性动作，不能用while）
While I was walking in the street, I heard someone call me from behind.
当我在街上走的时候，我听到有人从后面叫我。（表一段时间）
=I was walking in the street when I heard someone call me from behind.
我正在街上走，这时，我忽然听到有人从后面叫我。（表一点时间）
glance at 匆匆看一下，glance用作动词，例如：
He glanced at his watch.
他匆匆看了一下手表。
glance可用作名词，例如：
give/ take/ shoot/ throw a glance at 朝…匆匆看一下
He gave her a quick glance as she walked into the room.
当她走进房间时，他匆匆看了她一下。

4. The tall man was nowhere to be seen.
哪儿也看不到这个高个子男人了。
nowhere无处；任何地方都不。例如：
The missing wallet is nowhere to be found.
丢失的钱包任何地方都找不着。
Nowhere else could we find the missing wallet.
我们任何其他地方都找不到丢失的钱包。
to be found是动词不定式的被动形式，在此作定语。通常不定式的逻辑主语是动作的承受者时，且动作的施动者不明确时，不定式要用被动语态。例如：
The meeting to be held is of great importance.
明天要开的会很重要。
These are the books to be distributed among the students.
这些是要发给学生的书。

5. As she walked along, she heard the sound of footsteps, but by the time she reached the corner of the street, the footsteps were gone.
当她往前走的时候，她听到了脚步声，但是，等她走到十字路口的时候，脚步声就不见了。
句中as 的意思是“当…的时候”，相当于when。gone 在此是形容词，在句中作表语，意思是“不见了”。
gone 离去的，死去的，用光的(no longer present or no longer exist)。例如：
He turned the corner and was gone.
他在拐角处转了弯就不见了。
The days are gone when women worked for half pay.
妇女工作只拿男人一半工资的日子一去不复返了。
6. Now she wanted to run, but fear held her still.
现在她想跑，但是恐惧使她站着不动了。
hold 在句中的意思是“使身体保持某种姿势”（put or keep part of body in a certain position）。例如：
The dog held its tail between its legs.
狗把尾巴夹在两腿之间。
Can the baby hold herself up yet?
宝宝能自己站立了吗?