be介词短语
下面是小编整理的be介词短语，希望对大家有帮助。
be介词短语：
暗示"正在进行"这一动作，凡是用如：I am having a class now.(我正在上课。)但"正在进行"这一动作，还可以用"be+介词短语"来暗示。常见的介词短语类型有： be +at指导的介词短语;be +in指导的介词短语;be +on指导的介词短语; be +under指导的介词短语等。
Ⅰ.be+at指导的介词短语 be at war(正在交战)：
The two countries are at war now.两国正在交战。
(相当于：The two countries are waging a war now.)
be at work(正在工作)：Jim is at work on his car now.吉姆正在修自己的车。
(相当于：Jim is repairing his car now.)
be at peace(处于和平或舒适状况)：
Thus Europe was at peace for the first time in ten years.
于是欧洲在十年往后第一次进入和平状况。
be at table(正在吃饭)：When I arrived my friends were already at table.
当我达到时，我的伴侣们正在吃饭。
常见的这类结构还有：be at meeting正在开会;be at school正在上学;be at breakfast(lunch /supper)正在吃早(午/晚)饭;be at church正在做礼拜，等等。
Ⅱ.be+on指导的介词短语
be on strike(正在罢工)：The electricity workers have been on strike for several weeks now.电力工人到今朝已经罢工好几个礼拜了。(即此刻仍在罢工)
be on leave(正在休假)：Several soldiers are on leave in our village.几位甲士正在我们村子里休假。
be on the rise(正在上涨)：Prices of vegetables are on the rise.蔬菜价钱正在上涨。
常见的这类结构还有：be on a visit正在访谒;be on the stumps处在坚苦之中;be on sale正在出售(美语作：削价出售)，等等。
Ⅲ..be+in指导的介词短语 be in progress(正在进展)：
The building of the bridge is in progress.
这座桥梁正在施工中。(相当于：The bridge is being built now.)
be in trade(正在浊氚掺)：
Some people of this country are in gold and ivory trade.
这个国家的有些人正在做黄金和象牙生意。 be in fashion(风行)：
Long hair is very much in fashion now.现在，留长发正时兴。
be in trouble (处于困境/坚苦之中)：I am in great trouble. My little boy has fallen off a ladder and hurt himself.我赶上点麻烦，我的小儿子从梯子上失踪下来，而且摔伤了。
常见的这类结构还有：be in danger处在危险中;be in operation正在运行; be in action在勾当(运转/战斗)中;be in peril在危险之中;be in class正在上课;be in hospital 正在住院;be in office在执政;be in tears正在流泪;be in milk正在产奶;be in issue正在争论之中; be in church正在做礼拜;等等。
Ⅳ.be +under指导的介词短语
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打算。
be +under construction(正在建筑中)：The new railway is still under construction.新铁路仍在修建之中。
be +under discussion(正在谈判之中)：That issue has no relation to the matter under discussion.阿谁问题和正在谈判的事没有关系。
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。
值得英语进修者注重的是
⑴尽管be+介词短语能暗示"正在进行"这一意义，但它和be+此刻分词所暗示的语僧衣义是有分歧的。前者着重事物所处的状况，着重于静态;后者着重事物的动态，集中暗示事物的动感。
⑵ 绝大部门这类结构，其名词前都没有冠词，假如加一冠词，意义将迥然不同。如：The Conservative Party is in office.保守党在执政。The principal is now in the office.校长此刻在办公室。英语进修者对上述分歧决不成失踪以轻心。