keeping
動(dòng)詞＋ing規(guī)則：
1、直接加ing:go – going; do – doing;
2、以不發(fā)音的e結(jié)尾,把e去掉加ing :
write – writing; ride – riding; skate-skating;
3、末尾三個(gè)字母以“輔＋元＋輔”構(gòu)成的重讀閉音節(jié),雙寫(xiě)末尾字母加ing :
swim – swimming; skip—skipping; sit – sitting;
put – putting; shop – shopping; run – running;
4.ie結(jié)尾的,把ie改為y再加ing：
tie－tying(系); die－dying(死); lie－lying(撒謊)