if后面怎么不用现在分词
做了一个关于现在分词的题目
whileiwaswaitingatthedoctor's,ireadthewholeofashortstory.可以换成whilewaiting
Afteryouhaveusedthebruseh,putitinitsproperplace分句可以换成afterusingthebrush
ifyouworkhard,youwillsucceed.
为什么不用ifworkinghard,youwillsucceed而只是用workinghard,youwillsucceed?
刚才edwardswift说的有一点道理。不过
whileheworked,hesang可以改成whileworking,hesang.这里的while也不是介词啊,怎么也对呢