under repair.under是介词,为什么后面不用ing形式

under repair.under是介词,为什么后面不用ing形式 under repair的意思 under under My bike is under repair.sth.be under repair是不是固定结构? under是介词,为什么后面不用ing形式 ,如我在有道词典上搜到的一个句子The bridge is under repair.那座 The car is under repair.为何不是repairs? The damaged car is___.A.repairing B.repair C.repaired D.under repair 求详解 请问：be in repair 和 be under repair 11请举例说明. close under是神马意思 under consideration是啥意思? under umbrella是甚么意思 是under the charge of还是under charge of 是 under a big stress 还是 under big stress? The car is in repair.和 The car is under repair.意思相同吗?若不同,谢 under the under the under the