单词如何加ing?别忘了举例子。如:1````````````````````````````2````````````

单词如何加ing?
别忘了举例子。
如:
1````````````````````````````
2````````````````````````````
3````````````````````````````
4`````````````````````````````
``````````````````````````````

1.一般情况下,在动词后加-ing构成：
work→working 工作 sleep→sleeping 睡 wait→waiting等待
study→studying 学习 read→reading 读 talk→talking 谈话
2.不发音的-e结尾的动词去掉e后再加-ing：
smile→smiling 微笑 move→moving write→writing 写
但是,若是发音的e结尾,则不能去e：
see→seeing 看见 agree→agreeing 同意
3.以重读闭音节或r音节结尾且末尾只有一个辅音字母动词,要双写末尾的辅音字母再加-ing：
sit→sitting 坐 plan→planning 计划 prefer→preferring 宁愿
4.以字母ie结尾的动词,通常将ie改为y,再加ing：
die→dying 死 lie→lying 躺
【注】① 以字母l结尾动词,若末尾一个音节为重读音节,则必须双写l再加ing,如control / controlling,但若末尾一个音节为非重读音节,则可双写l(英国英语)或不双写l(美国英语),如travel / travel(l)ing.
② 名词变复数、形容词和副词变比较级和最高级、动词变过去式和过去分词等都有“改y规则”,“把y变成i再……”但动词的现在分词没有“改y规则”.