be+on引导的介词短语
be on strike(正在罢工):The electricity workers have been on strike for several weeks now.电力工人到目前已经罢工好几个星期了。(即现在仍在罢工)
be on leave(正在休假):Several soldiers are on leave in our village.几位军人正在我们村子里休假。
be on the rise(正在上涨):Prices of vegetables are on the rise.蔬菜价格正在上涨。
常见的这类结构还有:be on a visit正在访问;be on the stumps处在困难之中;be on sale正在出售(美语作:削价出售),等等。
Ⅳ.be +under引导的介词短语
be under consideration(正在考虑之中):The plan is under consideration by the Ministry of Education.教育部正在考虑这项计划。
be +under construction(正在修建中):The new railway is still under construction.新铁路仍在修筑之中。
be +under discussion(正在讨论之中):That issue has no relation to the matter under discussion.那个问题和正在讨论的事没有关系。
常见的这类结构还有:be under treatment正在治疗中;be under repair正在修理中,等等。
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2016-02-29
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