现在分词在什么情况下要双写加ing?incurring是怎么回事？
\u82f1\u8bed\u4e3a\u4ec0\u4e48\u6709\u4e9b\u8981\u53cc\u5199\u52a0\u73b0\u5728\u5206\u8bcd\uff08ing)1\u3001\u4ee5\u91cd\u8bfb\u95ed\u97f3\u8282\u7ed3\u5c3e\uff0c\u672b\u5c3e\u53ea\u6709\u4e00\u4e2a\u8f85\u97f3\u5b57\u6bcd\u7684\u52a8\u8bcd\uff0c\u8981\u53cc\u5199\u8fd9\u4e00\u8f85\u97f3\u5b57\u6bcd\uff0c\u518d\u52a0-ing\u3002\u4f8b\u5982\uff1arun-running, swim-swimming\u7b49\u3002
2\u3001\u4ee5-al,-er,-ill\u7ed3\u5c3e\u7684\u52a8\u8bcd\uff0c\u5373\u4f7f\u91cd\u97f3\u4e0d\u5728\u6700\u540e\u4e00\u4e2a\u97f3\u8282\u4e0a\uff0c\u4e5f\u8981\u53cc\u5199\uff0c\u518d\u52a0-ing \u5982\uff1atravelling\u7b49\u3002
\u8fd9\u662f\u56e0\u4e3a\u91cd\u97f3\u4e0d\u662f\u5728\u540e\u4e00\u4e2a\u97f3\u8282\uff0c\u800c\u662f\u5728\u7b2c\u4e00\u4e2a\u3002\u6240\u4ee5\u76f4\u63a5\u52a0
\u8fd9\u65f6\u53ef\u5343\u4e07\u522b\u53cc\u5199t\u54df\uff0c\u5c3d\u7ba1\u53ea\u662f\u4e00\u4e2a\u8f85\u97f3\u5b57\u6bcd
\u8bf7\u53ca\u65f6\u91c7\u7eb3\uff0c\u4e0d\u61c2\u7ee7\u7eed\u95ee( \u5929\u5929\u5728\u7ebf \uff09
(*^__^*) \u795d\u5b66\u4e60\u8fdb\u6b65! \u8c22\u8c22\uff01
eg: incurring,beginning,referring etc.
这是特殊情况啦~比如像light，lighting也是同样的道理，对吧？
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绛旓細閲嶈闂煶鑺 浠ヤ竴涓彂闊崇殑杈呴煶瀛楁瘝缁撳熬鐨勫姩璇瑕佸弻鍐 銆傚彟澶杛缁撳熬骞堕噸璇荤殑鍔ㄨ瘝涔熻鍙屽啓 濡傦細referring
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