正则表达式不会写

[renzaijiang]

he was dancing and singing.
把两ing的词找出来

[王集鹄]

var str = "he was dancing and singing. ";

var re = /[a-z]+ing\b/ig;
var match;
while (match = re.exec(str)) {
	alert(match);
}

[jinxfei]

<script>
var str = "he was dancing and singing ".match(/( \w*ing )/g)
alert(str);
</script>

[bing475879749]

LS的漂亮

[renzaijiang]

<script>
var str = "he was dancing and singing ".match(/( \w*ing )/g)
alert(str);
</script>
我感觉好象会把sing也找出来啊
怎么没啊

[zb1999]

up

[什么都不能]

一楼的应该可以.

[wcwtitxu]

应该需要 \b 吧

var str = "he was dancing and singing".match(/(\b\w*(ing)\b)/g) 
alert(str);