1。as是连词，表示“随着”的意义。lives是life的复数，意义是“生活”。
2。as是连词，表示“因为，由于”的意义。wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
As的用法小结
as可以作连词、介词及关系代词和副词。现将其用法小结如下:
（一）、 as作连词的用法:
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while的用法区别。 ①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如:
The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest.
2)表示两个同步发生的动作或行?意思是随着-----的发展.如:
As time went on / by, she became more and more beautiful .
As children get older, they become more and more interested in everything.
3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry.
4)接在名词后面表示某一个年龄段时.如:
As a young man, he was active in sports.
②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours.
③ while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.
2. As =Since 作"既然"、"由于"解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如: As he’s been ill for ages, I will help him.
As / Since you're not feeling well, you may stay at home.
As he wasn't ready , we went without him.
3. As =in the way that作"像"、"按照……的方式"解,引导方式状语从句。如:
Do as I told you.
Remember, you must do everything as I do.
4. 用于as--- as或not / so/ as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They helped the old as much as possible.
I don't speak English so/ as well as she does.
5. 表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:
adj. /adv. / n.+as +主语+谓语+主句。如: Young as he is, he knows much.
Tired as they were, they walked on.
6. 表示也------一样。 She is a doctor, as was her husband.
（二）、 as作关系代词,引导定语从句,表示正如,这一点.如:
He is very careful, as we all know.
As is well-known, <st1:country-region w:st="on">Taiwan</st1:country-region> belongs to <st1:country-region w:st="on">China</st1:country-region>.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如:
Such a clever girl as she can learn anything quickly.
I was reading the same book as he bought yesterday.
（三）、as作介词的用法.
1.表示好像。如:He dressed as a policeman.
2. 表示作为当作。如：I found a job as a guide.
3. 当某人是某身份时。如：As a child , she was sent to abroad.
4. as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如:
As a Party member, I'll take the lead in everything. (状语)
She works as a model. (状语)
She has me as one of her best friends.(引起宾语补足语)
（四）、作副词的用法 1 表示与------等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved.
总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。
as of (=as from) 从……起。例如：1) You are in charge (负责) as of today. 2) The agreement starts as from March 13.
as for至于。例如：1) As for me, I shall return there on arrival. 2) As for me, I'm in favor of the first view.
as to关于；至于。例如：He asked my advice as to what to do next.
as with与 ……一样。例如：As with so many of the major problems of society, the precise extent and nature of the environmental crisis are not entirely clear.
as against (=in contrast with) 与……相对照。例如：1) She gets Saturdays off in her new job as against working alternate weekends in her last one. (她新找的这份工作星期六放假，而原来的那份工作周末是隔周放假。) 2) The business done this year amounts to $20,000 as against $ 15,000 last year.
as regards至于。例如：There are no special rules as regards what clothes you should wear. (至于应该穿什么衣服没有硬性规定。)
as follows如下。例如：1) The reasons are as follows. 2) The report reads as follows.
as it were可以说，姑且这么说。例如：He is, as it were, a walking dictionary. (他，可以说，是一部活词典。)
as opposed to和 ……相反。例如：John likes rice, as opposed to Mary, who hates it.
as soon as possible尽快地。例如：We should take steps as soon as possible.
may(might , could) as well do sth. 不妨，最好（做某事）。例如：Since it is too late, we might as well go back home.
as a rule通常。例如：1) As a rule they sat together very quietly. 2) His writing as a rule is elegant.
as yet到这时为止（还没有）：But none of these are as yet carefully thought-out plans.
such … as to这样 …… 以致。例如：I went about my job in such a way as to try to kill two birds with one stone.
not so much …as与其说……，倒不如说…… ：The trumpet player was certainly loud. But I wasn't bothered by his loudness so much as by his lack of talent. (这个吹号手的声音确实很大，但我烦的与其说是他吹得太响，倒不如说是他缺乏天分。)
such as例如：Studies show that the things that contribute most to a sense of happiness cannot be bought with money, such as a good family life, friendship and work satisfaction. (研究表明，那些最能使人产生幸福感的东西是不能用金钱买到的，如和睦的家庭生活、友谊和事业上的满足感。)
as long as (=so long as)只要（引导条件从句）：As long as he works hard, I don’t mind when he finishes the experiment.
Just as … so …正如 …… 一样，……也……。例如：Just as air is important to man, so is water to fish.
as though (=as if ) 似乎。例如：Christie stared angrily at her boss and turned away, as though to go out of the office.
much as虽然。例如：Much as I admired David as a poet, I don't like him as a man. (虽然我仰慕作为诗人的大卫，但我不喜欢他的为人。)
as 虽然 (引导部分倒装的让步从句)：Young as he is, he knows a lot. (他虽年轻，但很懂事。)
as作关系代词，引导定语从句，代表整个主句的意思：1）A good many proposals were raised by the delegates, as was to be expected . (正如所料，代表们提出了许多建议。) 2) As might be expected, the response to the question was mixed. (正如所料，人们对这个问题观点不一。)
as…as引出比较状语从句：Americans eat twice as much protein as they actually need every day. (美国人摄取的蛋白质是他们实际需要量的两倍。)
As is often the case事情常常是这样：As is often the case, it happened so gradually that it was barely perceptible.
第二篇：As用法小结
1。as是连词，表示“随着”的意义。lives是life的复数，意义是“生活”。<BR>
2。as是连词，表示“因为，由于”的意义。wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
As的用法小结
as可以作连词、介词及关系代词和副词。现将其用法小结如下:
（一）、 as作连词的用法:
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while的用法区别。
①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如:
The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest.
2)表示两个同步发生的动作或行?意思是随着-----的发展.如:
As time went on / by, she became more and more beautiful .
As children get older, they become more and more interested in everything.
3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry.
4)接在名词后面表示某一个年龄段时.如:
As a young man, he was active in sports.
②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours.
③ while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.
2. As =Since 作"既然"、"由于"解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如: As he’s been ill for ages, I will help him.
As / Since you're not feeling well, you may stay at home.
As he wasn't ready , we went without him.
3. As =in the way that作"像"、"按照……的方式"解,引导方式状语从句。如:
Do as I told you.
Remember, you must do everything as I do.
4. 用于as--- as或not / so/ as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They helped the old as much as possible. I don't speak English so/ as well as she does.
5. 表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:
adj. /adv. / n.+as +主语+谓语+主句。如: Young as he is, he knows much.
Tired as they were, they walked on.
6. 表示也------一样。 She is a doctor, as was her husband.
（二）、 as作关系代词,引导定语从句,表示正如,这一点.如:
He is very careful, as we all know.
As is well-known, Taiwan belongs to China.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如:
Such a clever girl as she can learn anything quickly.
I was reading the same book as he bought yesterday.
（三）、as作介词的用法.
1.表示好像。如:He dressed as a policeman.
2. 表示作为当作。如：I found a job as a guide.
3. 当某人是某身份时。如：As a child , she was sent to abroad.
4. as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如:
As a Party member, I'll take the lead in everything. (状语)
She works as a model. (状语)
She has me as one of her best friends.(引起宾语补足语)
（四）、作副词的用法 1 表示与------等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved. 总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。
as of (=as from) 从……起。例如：1) You are in charge (负责) as of today. 2) The agreement starts as from March 13.
as for至于。例如：1) As for me, I shall return there on arrival. 2) As for me, I'm in favor of the first view.
as to关于；至于。例如：He asked my advice as to what to do next.
as with与 ……一样。例如：As with so many of the major problems of society, the precise extent and nature of the environmental crisis are not entirely clear.
as against (=in contrast with) 与……相对照。例如：1) She gets Saturdays off in her new job as against working alternate weekends in her last one. (她新找的这份工作星期六放假，而原来的那份工作周末是隔周放假。) 2) The business done this year amounts to $20,000 as against $ 15,000 last year.
as regards至于。例如：There are no special rules as regards what clothes you should wear. (至于应该穿什么衣服没有硬性规定。)
as follows如下。例如：1) The reasons are as follows. 2) The report
reads as follows.
as it were可以说，姑且这么说。例如：He is, as it were, a walking dictionary. (他，可以说，是一部活词典。)
as opposed to和 ……相反。例如：John likes rice, as opposed to Mary, who hates it.
as soon as possible尽快地。例如：We should take steps as soon as possible.
may(might , could) as well do sth. 不妨，最好（做某事）。例如：Since it is too late, we might as well go back home.
as a rule通常。例如：1) As a rule they sat together very quietly. 2) His writing as a rule is elegant.
as yet到这时为止（还没有）：But none of these are as yet carefully thought-out plans.
such … as to这样 …… 以致。例如：I went about my job in such a way as to try to kill two birds with one stone.
not so much …as与其说……，倒不如说…… ：The trumpet player was certainly loud. But I wasn't bothered by his loudness so much as by his lack of talent. (这个吹号手的声音确实很大，但我烦的与其说是他吹得太响，倒不如说是他缺乏天分。)
such as例如：Studies show that the things that contribute most to a sense of happiness cannot be bought with money, such as a good family life, friendship and work satisfaction. (研究表明，那些最能使人产生幸福感的东西是不能用金钱买到的，如和睦的家庭生活、友谊和事业上的满足感。)
as long as (=so long as)只要（引导条件从句）：As long as he works hard, I don’t mind when he finishes the experiment.
Just as … so …正如 …… 一样，……也……。例如：Just as air is important to man, so is water to fish.
as though (=as if ) 似乎。