现在分词的变化:
1.直接在词尾加ing,如:playing,listening等等
2.以不发音e结尾,去e加ing,如having,coming,writing,taking,making,arriving,living,hoping等等
3.重读闭音节单词,末尾以元音字母加一个辅音字母结尾的,双写这一辅音字母加ing,如: getting,beginning,putting,stopping,sitting,cutting,running,shopping,swimming,setting……
