①.一般情况直接加-ing, 如: working, studying, going, seeing, staying ②.以不发音的-e结尾, 去掉-e再加-ing, 如: live –living, move-moving; ③.以重读闭音节或-r音节结尾, 末尾又只有一个辅音字母, 将末尾辅音字母双写, 再加-ing, 如: planning, starring, beginning, referring; ④.少数几个以-ie结尾的重读开音节动词, 应将-ie变成y, 再加- ing, 如: die –dying, tie –tying, lie –lying ⑤.少数双音节动词, 虽然重音在第一音节, 也双写末尾的辅音字母, 然后再加-ing, 如: travel –traveling, 但在美式英语中一般不双写 ⑥.以非重读的元音字母加-l结尾的动词构成-ing时, l要双写, 再加-ing, 如: travelling, quarrelling ⑦.注意以下几个词的- ing形式: hoe –hoeing, picnic – picnicking, panic –panicking, dye –dyeing 查看更多

 

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