
1.一般是直接加ing,例如eating,studying2.以不发音的e结尾的单词,去e加ing,例如having,coming3.重读闭音节结尾的词,且末尾只有一个辅音字母的单词,双写末尾的辅音字母再加ing,例如swimming,running

1.一般是直接加ing,例如eating,studying2.以不发音的e结尾的单词,去e加ing,例如having,coming3.重读闭音节结尾的词,且末尾只有一个辅音字母的单词,双写末尾的辅音字母再加ing,例如swimming,running