as从句前后的时态有进行时和一般时。
as：
prep.像;如同;作为;当作。
adv.(比较时用)像…一样，如同;(指事情以同样的方式发生)和…一样。
conj.当…时;随着;照…方式;因为;由于。
This year's results are virtually the same as last year's.
今年的结果几乎和去年的一样。
It's not so easy as you'd think.
不像你想的那么容易。
You will always have the bad as well as the good in the world.
人生在世总是有苦有甜。
It's known as the most dangerous part of the city.
人们都认为那是市内最危险的地段。
They'll respect you as long as you play fair.
只要为人正直，别人就会尊敬你。
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