.... However, expenses have increased as well.为什么上面3句however前有的是用了; 但有的的仍然是, 为什么呢?2)I had arrived early as was my habit; I, therefore, felt priviledged to take my leave without delay.这句中therefore和I 前用了; 请教老师as was my habit中的as ...
The transition will be politically hard in places that have invested a lot in being covid-free.请问老师这里的being covid-free是动名词短语作in的宾语吧?我疑惑的是为什么要用being呢,不可以invested a lot in covid-free places吗?