the plastic shopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,whthe plasticshopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,when not properly disposed of,engender a colossal amount of non

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theplasticshoppingbags,chopsticks,to-goboxesandmineral-waterbottles,tonamebutafew,whtheplasticshoppi

the plastic shopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,whthe plasticshopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,when not properly disposed of,engender a colossal amount of non
the plastic shopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,wh
the plasticshopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,when not properly disposed of,engender a colossal amount of non-biodegradable refuse.为什么when后面直接加not而没有加助动词来否定,另外 disposed 后面为什么有个of.

the plastic shopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,whthe plasticshopping bags,chopsticks,to-go boxes and mineral-water bottles,to name but a few,when not properly disposed of,engender a colossal amount of non
引导时间状语的 when、while、after、before 等连词,从句中可以省去主语以及助动词直接用分词短语来表示,
when not properly disposed of,其实就等于 when (they are) not properly disposed of,其中省去了指代“塑料购物袋、筷子、拉动式旅行箱和矿泉水瓶”的代词 they 和构成被动语态的助动词 are.
除此以外,if、because、although 等连词引导的从句都可照此办理.如：
--While doing it,he told me how to do it well = While he was doing it,he told me how to do it well.他做这件事的同时告诉我怎样才能把它做好.
--I'll do it if dying in the attempt = I'll do it if I die in the attempt.即使会丧命我也要试一下.
--I'll do it if dying in the attempt = I'll do it if I die in the attempt.即使会丧命我也要试一下.

此句的谓语是engender,而when not 是时间状语,故没有系动词.disposed of是宾格，顺成正常语序是dispose of the plastic shopping bags xxxxxxxxxx