,with可以怎么用??１．Guangzhou , with its flowers blooming all the year round,is .........２．　........,it is located on the South China Sea, with Hongkong to its southeast.介词是好用可就是不解～～不知怎么用～～～害得写作文时．．．．还有２中的ＴＯ，　是介词短语作定语吗？什么时候可以用？？