动词现在分词

　　规则1 一般动词加-ing e.g. look-looking, read-reading, play-playing

　　规则2 以不发音的字母结尾的单词去e加-ing e.g. make-making, take-taking, arrive-arriving

　　规则3 重读闭音节词结尾， 即单词中只有一个元音字母，其后紧跟一个辅音字母的词，双写辅音字母再加-ing e. g. run-running, sit-sitting, get-getting, swim-swimming, stop-stopping