offer怎样加ing

offer加ing: offering

现在分词加ing规则如下：

1)一般情况下直接加ing

think---thinking

sleep---sleeping

study---studying

speak---speaking

carry---carrying

say---saying

2)以不发音的字母e结尾的单词，去掉字母e，再加ing

wake---waking

make---making

come---coming

take---taking

leave---leaving

have---having

3)以重读闭音节结尾，先双写末尾的辅音字母，再加ing。

cut--cutting

get--getting

hit--hitting

4)以y结尾的动词直接加ing

carry——carrying

enjoy——enjoying

5)以ie结尾的动词，把ie改为y，再加ing

die---dying

lie---lying