主动被动

一般现在时　       does                 is done

一般过去时 　     did                  was done

现在进行体　       is doing             is being done

过去进行体　      was doing            was being done

现在完成体 　     has done             has been done     

过去完成体　      had done             had been done 

现在完成进行体　 has been doing                   

过去完成进行体　 had been doing  

不定式　   主动　被动

一般形式  (to) do　 (to) be done

进行体    (to) be doing 　           

完成体 (to) have done         (to) have been done　

完成进行体 (to) have been doing　

-ing分词　主动 被动

一般形式           doing                 being done

完成体             having done           having been done

It is only when you nearly lose someone that you become fully conscious of how much you value him.?（强调）
Just as the soil is a part of the earth,　so is the atmosphere.?正如…，…也…
none other than意为“不是别人，正是…”

lenses镜片
glasses眼镜
sights视野；风景
crystals水晶，晶体

You should have your eyes tested every year in case the lenses of your spectacles need changing.

turn up出现，露面 
turn in归还，递交 
turn out原来是，证明是 
turn to求助于；求教于 
hang out 把……挂出
hang up 把……挂起，挂断(电话)
hang together 结合在一起
hang round 闲荡
collaborate合作，合著in collaboration with
compile汇集；编辑
gather聚会，集会
collect意为“收集；集合

When Sarah and I collaborated　on an article for the school newspaper, we found it difficult to work together.?

fee　费(如会费，入场费，手续费等)　
tax　税，税款 
payment　支付，付款 
premium　津贴；酬金 
aid辅助器具　
translate变换，把…转化成 
help帮助　
transfer移交，迁移
support支持　
transplant移植(器官)
tool工具　
transmit传染(疾病)，传达(知识)