1.一般情况下,直接加ing,如:cook-cooking 2.以不发音的e结尾,去e加ing,如:make-making, taste-tasting 3.如果末尾是辅音字母加一个元音字母和一个辅音字母,双写末尾的辅音字母,再加ing,如:run-running, stop-stopping