Linda is writing a litter to her pen pal.(改否定句)
问题描述:
Linda is writing a litter to her pen pal.(改否定句)
why?为何要用现在进行时?
答
当然可以用进行时,表明正在进行的动作,否定的进行时也可用,主要强调某人在某个时刻没在做某项工作.